- Add file_name field to `RealmEmoji` model and migration.
- Add emoji upload supporting to Upload backends.
- Add uploaded file processing to emoji views.
- Use emoji source url as based for display url.
- Change emoji form for image uploading.
- Fix back-end tests.
- Fix front-end tests.
- Add tests for emoji uploading.
Fixes#1134
We now wait to load Organization sections until you
click on the section (or virtually click by using arrow
keys).
Some of the sections are coupled in terms of their setup,
so some sections will already be loaded if you had clicked
on a related section.