[#83458484] convert ALL THE THINGS!
Merge branch 'master' into select2-conversion

Conflicts:
	app/assets/stylesheets/ui/typeahead.css.scss
HOUND [ci skip]
[#83458484] remove unnecessary test
[#83458484] fix specs, remove tests
SCHEMA WTF HOW [ci skip]
Merge pull request #677 from Tahi-project/select2-conversion

[#83458484] convert the rest of the selects to Select2