Frontend for custom groups management

[PVince81]

• form / panel to create new groups and become admin
• list
  • see groups in which current user is member (read-only)
  • see members of groups in which current user is member
• search / quick filter ?
• actions as group admin
  • rename group
  • delete group
  • add/remove members
  • set member / groupadmin role on group members
• actions as group member
  • see members inside group
  • leave group

[PVince81]

PR here #13

[PVince81]

Some ideas for the UI: https://github.com/owncloud/platform/issues/15#issuecomment-279327895

I just realized that if we want to display the user display names instead of user id, we can't join with any tables. We'd need to resolve each user individually in a PHP-level join. That's f#cking horrible.

That is, unless we can join with the future user account table: owncloud/core#23558

So for now I'll make a very crude UI that only work with user ids.

[PVince81]

Moved backend changes to #21

• REQUIRES: Backend fixes #21

[PVince81]

All actions already available in the frontend PR: #13

[PVince81]

(except filter/autocomplete)

[PVince81]

• avatars for users
• display names of users instead of ids: Show user display names instead of user id #23

[PVince81]

The frontend is implemented. UX tweaks to be adressed as separate tickets.