* 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
