fix(curriculum): add isHidden: false to challenges

This includes certificates (where it does nothing), but does not
include any translations.

curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-bar-chart.english.md

@@ -3,6 +3,7 @@ id: bd7168d8c242eddfaeb5bd13
 title: Visualize Data with a Bar Chart
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301464
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.english.md

@@ -3,6 +3,7 @@ id: 587d7fa6367417b2b2512bbf
 title: Visualize Data with a Choropleth Map
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301465
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-heat-map.english.md

@@ -3,6 +3,7 @@ id: bd7188d8c242eddfaeb5bd13
 title: Visualize Data with a Heat Map
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301466
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-scatterplot-graph.english.md

@@ -3,6 +3,7 @@ id: bd7178d8c242eddfaeb5bd13
 title: Visualize Data with a Scatterplot Graph
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301467
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.english.md

@@ -3,6 +3,7 @@ id: 587d7fa6367417b2b2512bc0
 title: Visualize Data with a Treemap Diagram
 isRequired: true
 challengeType: 3
+isHidden: false
 forumTopicId: 301468
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-hover-effect-to-a-d3-element.english.md

@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd4
 title: Add a Hover Effect to a D3 Element
 challengeType: 6
+isHidden: false
 forumTopicId: 301469
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.english.md

@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd6
 title: Add a Tooltip to a D3 Element
 challengeType: 6
+isHidden: false
 forumTopicId: 301470
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-attributes-to-the-circle-elements.english.md

@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bd8
 title: Add Attributes to the Circle Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301471
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.english.md

@@ -2,6 +2,7 @@
 id: 587d7fad367417b2b2512bdf
 title: Add Axes to a Visualization
 challengeType: 6
+isHidden: false
 forumTopicId: 301472
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-classes-with-d3.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc8
 title: Add Classes with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301473
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa6367417b2b2512bc2
 title: Add Document Elements with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301474
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-inline-styling-to-elements.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc6
 title: Add Inline Styling to Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301475
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-d3-elements.english.md

@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd2
 title: Add Labels to D3 Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301476
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.english.md

@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bd9
 title: Add Labels to Scatter Plot Circles
 challengeType: 6
+isHidden: false
 forumTopicId: 301477
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc7
 title: Change Styles Based on Data
 challengeType: 6
+isHidden: false
 forumTopicId: 301479
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-color-of-an-svg-element.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bd1
 title: Change the Color of an SVG Element
 challengeType: 6
+isHidden: false
 forumTopicId: 301480
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bca
 title: Change the Presentation of a Bar Chart
 challengeType: 6
+isHidden: false
 forumTopicId: 301481
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-bar-for-each-data-point-in-the-set.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bcd
 title: Create a Bar for Each Data Point in the Set
 challengeType: 6
+isHidden: false
 forumTopicId: 301482
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-linear-scale-with-d3.english.md

@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bda
 title: Create a Linear Scale with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301483
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/create-a-scatterplot-with-svg-circles.english.md

@@ -2,6 +2,7 @@
 id: 587d7fab367417b2b2512bd7
 title: Create a Scatterplot with SVG Circles
 challengeType: 6
+isHidden: false
 forumTopicId: 301484
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/display-shapes-with-svg.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bcc
 title: Display Shapes with SVG
 challengeType: 6
+isHidden: false
 forumTopicId: 301485
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-change-the-height-of-each-bar.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bcf
 title: Dynamically Change the Height of Each Bar
 challengeType: 6
+isHidden: false
 forumTopicId: 301486
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/dynamically-set-the-coordinates-for-each-bar.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bce
 title: Dynamically Set the Coordinates for Each Bar
 challengeType: 6
+isHidden: false
 forumTopicId: 301487
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/invert-svg-elements.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa9367417b2b2512bd0
 title: Invert SVG Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301488
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/learn-about-svg-in-d3.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bcb
 title: Learn About SVG in D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301489
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/select-a-group-of-elements-with-d3.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa6367417b2b2512bc3
 title: Select a Group of Elements with D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301490
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.english.md

@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bdb
 title: Set a Domain and a Range on a Scale
 challengeType: 6
+isHidden: false
 forumTopicId: 301491
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/style-d3-labels.english.md

@@ -2,6 +2,7 @@
 id: 587d7faa367417b2b2512bd3
 title: Style D3 Labels
 challengeType: 6
+isHidden: false
 forumTopicId: 301492
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/update-the-height-of-an-element-dynamically.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa8367417b2b2512bc9
 title: Update the Height of an Element Dynamically
 challengeType: 6
+isHidden: false
 forumTopicId: 301493
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.english.md

@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bde
 title: Use a Pre-Defined Scale to Place Elements
 challengeType: 6
+isHidden: false
 forumTopicId: 301494
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-dynamic-scales.english.md

@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bdd
 title: Use Dynamic Scales
 challengeType: 6
+isHidden: false
 forumTopicId: 301495
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.english.md

@@ -2,6 +2,7 @@
 id: 587d7fac367417b2b2512bdc
 title: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
 challengeType: 6
+isHidden: false
 forumTopicId: 301496
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-data-in-d3.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc4
 title: Work with Data in D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301497
 ---
 

curriculum/challenges/english/04-data-visualization/data-visualization-with-d3/work-with-dynamic-data-in-d3.english.md

@@ -2,6 +2,7 @@
 id: 587d7fa7367417b2b2512bc5
 title: Work with Dynamic Data in D3
 challengeType: 6
+isHidden: false
 forumTopicId: 301498
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/access-the-json-data-from-an-api.english.md

@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be4
 title: Access the JSON Data from an API
 challengeType: 6
+isHidden: false
 forumTopicId: 301499
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/change-text-with-click-events.english.md

@@ -2,6 +2,7 @@
 id: 587d7fad367417b2b2512be2
 title: Change Text with click Events
 challengeType: 6
+isHidden: false
 forumTopicId: 301500
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/convert-json-data-to-html.english.md

@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be5
 title: Convert JSON Data to HTML
 challengeType: 6
+isHidden: false
 forumTopicId: 16807
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-geolocation-data-to-find-a-users-gps-coordinates.english.md

@@ -2,6 +2,7 @@
 id: 587d7faf367417b2b2512be8
 title: Get Geolocation Data to Find A User's GPS Coordinates
 challengeType: 6
+isHidden: false
 forumTopicId: 18188
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-fetch-method.english.md

@@ -2,6 +2,7 @@
 id: 5ccfad82bb2dc6c965a848e5
 title: Get JSON with the JavaScript fetch method
 challengeType: 6
+isHidden: false
 forumTopicId: 301501
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/get-json-with-the-javascript-xmlhttprequest-method.english.md

@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be3
 title: Get JSON with the JavaScript XMLHttpRequest Method
 challengeType: 6
+isHidden: false
 forumTopicId: 301502
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/handle-click-events-with-javascript-using-the-onclick-property.english.md

@@ -2,6 +2,7 @@
 id: 587d7fad367417b2b2512be1
 title: Handle Click Events with JavaScript using the onclick property
 challengeType: 6
+isHidden: false
 forumTopicId: 301503
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.english.md

@@ -2,6 +2,7 @@
 id: 587d7faf367417b2b2512be9
 title: Post Data with the JavaScript XMLHttpRequest Method
 challengeType: 6
+isHidden: false
 forumTopicId: 301504
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/pre-filter-json-to-get-the-data-you-need.english.md

@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be7
 title: Pre-filter JSON to Get the Data You Need
 challengeType: 6
+isHidden: false
 forumTopicId: 18257
 ---
 

curriculum/challenges/english/04-data-visualization/json-apis-and-ajax/render-images-from-data-sources.english.md

@@ -2,6 +2,7 @@
 id: 587d7fae367417b2b2512be6
 title: Render Images from Data Sources
 challengeType: 6
+isHidden: false
 forumTopicId: 18265
 ---