* feat(seed): Add modern challenge
* chore(react): Use prop-types package
* feat: Initial refactor to redux-first-router
BREAKING CHANGE: Everything is different!
* feat: First rendering
* feat(routes): Challenges view render but failing
* fix(Challenges): Remove contain HOC
* fix(RFR): Add params selector
* fix(RFR): :en should be :lang
* fix: Update berks utils for redux
* fix(Map): Challenge link to arg
* fix(Map): Add trailing slash to map page
* fix(RFR): Use FCC Link
Use fcc Link to get around issue of lang being undefined
* fix(Router): Link to is required
* fix(app): Rely on RFR state for app lang
* chore(RFR): Remove unused RFR Link
* fix(RFR): Hydrate initial challenge using RFR and RO
* fix: Casing issue
* fix(RFR): Undefined links
* fix(RFR): Use onRoute<name> convention for route types
* feat(server/react): Add helpful redux logging/throwing
* fix(server/react): Strip out nonjson from state
This prevents thunks in routesMap from breaking serialization
* fix(RFR/Link): Should accept any renderable
* fix(RFR): Get redirects working
* fix(RFR): Redirects and not found's
* fix(Map): Move challenge onClick handler
* fix(Map): Allow Router.link to handle clicks after onClick
* fix(routes): Remove react-router-redux
* feat(Router): Add lang to all route actions by default
* fix(entities): Only fetch challenge if not already loaded
* fix(Files): Move files to own feature
* chore(Challenges): Remove vestigial hints logic
* fix(RFR): Update challenges on route challenges
* fix(code-storage): Should use events instead of commands
* fix(Map): ClickOnMap should not hold on to event
* chore(lint): Use eslint-config-freecodecamp
Closes#15938
* feat(Panes): Update panes on route instead of render
* fix(Panes): Store panesmap and update on fetchchallenges
* fix(Panes): Normalize panesmaps
* fix(Panes): Remove filter from createpanemap
* fix(Panes): Middleware on location meta object
* feat(Panes): Filter preview on nonhtml challenges
* build(babel): Add lodash babel plugin
* chore(lint): Lint js files
* fix(server/user-stats): Remove use of lodash chain
this interferes with babel-plugin-lodash
* feat(dev): Add remote redux devtools for ssr
* fix(Panes): Dispatch mount action
this is needed to trigger window/divider epics
* fix(Panes): Getpane to use new panesmap format
* fix(Panes): Always update panes after state
this lets the panes logic be affected by changes in state
* feat(nav): make navbar static
make the navbar in react layout and the static layout stick to the top of the screen
* feat(challenges): Make classic view flex
Classic view now uses flex to control it's height. This was necessary to control view and allow
navbar to be static on other pages.
This breaks mobile view and other non-classic challenge views
* feat(app): Add logic to make screen expand on tablet
* fix(app): let routes define their content structure
* fix(less): use American spelling of gray
* fix(classic-preview): make preview smaller to prevent scroll
* feat(classic-frame): Make frame border less distinct
* fix(challenges): scope test suite less to challenges
* feat(challenges): make generic ChallengeTitle component
