Image upload validation, Markdown editor for field descriptions, and other bugfixes
- Fixed link to heroku 1 click deploy - by @lexoyo
- Display a debug warning if a user is an admin and the debug mode is on (for development purposes) - by @Angamanga and @tuxpiper
- Category selector: show the category selector only when categories have a length greater than zero - by @Guzzler
- Fix sortableJS version to 1.10 - by @aitorres
- Lower amount of clicks needed to change language - by @c3ho
- Formatting options in the description of all survey fields - by @Angamanga
- Show full date on hover state for post metadata by @AlanaFarkas
- Show intercom link only if intercom ID is set by @ritesh-pandey
- Validate images before attempting an upload by @Angamanga