[test ui]

level_source_id is later fetched via ajax from /api/user_progress,
and that one is actually used.

As yet unused, but has at least basic support for project-backed level behavior too.

Put it in the setInitialAnimationList action creator in animationListModule.js, so soon when we want to call it on reset too, we can migrate old level animation JSON as well.

Somewhat repurpose sourceUrl property so it's only filled in when the animation is not stored in the animations API.

Fixes a merge bug with adding a new animation.

Fix retrieval of images from images.code.org by using our media proxy when loading a by-reference animation from source and the source URL is absolute.  Also simplifies the loadFromSource method by depending on the store to look up the source url.

Bump all references to stages in allthethings script, 19 and up (because 19 is where the gamelab stage got added) by one, so they refer to the level they referred to before.

[test ui]

…ulated-animations

[test ui]

[test ui]

…op exit survey emails and certificate attachments

Adds the type column to the dashboard sections table.

…ulated-animations

For applab import, we need to be able to use the collections api against
projects that are not loaded on the page. With this change, you can now
say:

```javascript
sourcesApi.withProjectId('some-project').ajax(...)
```

And expect it to work.

In applab screen import, we need to fetch other projects so we can merge
their screens and assets. I'm putting the state maintenance for this
process into redux so that the UI components are simpler and everything
is easier to test.

Create new button component with unified styles

… a default). Fixed attachment encoding issue

Excludes IE 10 from activity-monitor.

Revert "Revert "Moving channel token logic from levels_helper into models""

…roject-form

Add redux actions/reducers for fetching channel and source information for a project

Paginate via find_each.

…nimations

Gamelab: Levels can prepopulate animations

…idation

Deploy to levelbuilder

Real-time animation JSON validation

…link

Make How It Works link work for embeds

Added attachment support to dashboard poste emails.

Remove unused level_source_id from appOptions

Level builder changes