[web] Admin Settings: Add possibility to filter users who have not yet logged in

[tbsbdr]

Describe the bug

relates to https://github.com/owncloud/enterprise/issues/6597

Steps to reproduce

1. login via https://github.com/owncloud/enterprise/issues/6597
2. Go to Admin Settings > Users
3. Filter by Roles > User (or Roles > User)
4. Users that have never logged in cant get filtered

Expected behavior

• Option 1 (preferred): Users without a rele gets listed
  Alternative: <-- Important: That would be the real expect behaviour, but due to technical limitations, option 2 would be the way to go
• Option 2 (if Option 1 is too expensive):
  • Add role filteroption None (Never logged in) that shows all users without a role.
  • Add group filteroption None that shows all users without a group. Show option None on top of the list
  • Note: Option 2 would be a workaround for the situation that we don't know the role/group ... until the user loggs in at least once.

Actual behavior

• Users that have never logged in cant get filtered

[tbsbdr]

@tbsbdr add backend ticket

[AlexAndBear]

If we choose option 1: this would be a server only ticket.
Option 2: This might need an additional server implementation (filter).

But I despite option 2

[AlexAndBear]

@rhafer can we get a filter in this sprint? It seems to miss and blocks this ticket

Cc @micbar

[rhafer]

Just for completeness: We just discussed this and figured that this needs some more thoughts as the resulting (short-term) solution would be quite slow. Relates a bit to owncloud/ocis#8938 . We're postponing this for now.

[AlexAndBear]

I removed the ticket from the sprint, pr with the current progress will be linked, if we decide to go that route anyways later