Conflicts:
- app/views/admin/pending_accounts/index.html.haml
No real conflict, upstream changes too close to glitch-specific
theming system changes.
- config/navigation.rb
Upstream redesigned the settings navigation, took those changes
and re-inserted the flavours menu.
* Add "why do you want to join" field to invite requests
Fix#10512
* Remove unused translations
* Fix broken registrations when no invite request text is submitted