Close meetings from inside

[reiterl]

Resolve #3622

Needs:

• Add setting for closed meeting openslides-backend#2523
• Add new setting for closed meeting openslides-meta#128

Draft version with setting, dashboard, meeting list, committee detail changes, and disable setting for templates

[Elblinator]

client-side:

• meeting access should be prohibited
• delete dialog when deleting an account > the dialog should say when a meeting is locked from the inside
• guards should not allow entry into meeting routes if the meeting is locked
• organisation-level actions which would change the meeting (add user to meetings) should not be usable
• operator.service should be adjusted to match https://github.com/OpenSlides/OpenSlides/wiki/Permission-System and the changed actions and presenter in the backend see (https://github.com/OpenSlides/openslides-backend/pull/2523/files)

[reiterl]

As far as I understand the PermissionGuard it forbids entering meetings, if you are not superadmin and not in the meeting (in one group).
My last commit added the delete user note.
Open so far:

• export meeting should not be allowed for closed meetings
• user.assign meeting, closed meetings should be filtered from selection.

[reiterl]

So long, so good. We need a test, what is missing here. @Elblinator pls test and @bastianjoel pls review.

[Elblinator]

Only apply if the meeting is locked from the inside...

Orga-level > Committee-detail:

• in the three dot menu > Hide "Public template", "Duplicate" and "export"
• Relevant for committee admins (who are not meeting admins): Hide the "edit option"
• Relevant for superadmins (who are not meeting admins):
  • id the edit meeting view is opened then disable all meeting specific info besides the Superadmin settings

Orga-level > account-list > multi-select:

• select account > "Set/remove meeting ..." > The locked meeting is still in that list and selectable, please also hide the locked meetings from that list

I was not able to test the meeting-level. So I still need to do that

[reiterl]

I worked on the CR. Introduced some changes for the committee-meeting-preview and the 'Set/remove meetings'
bulk action.

[Elblinator]

only for superadmins:
in the committee detail view the edit option for closed meetings should still be visible even if the superadmin is not a meeting admin

[reiterl]

Okay, updated the PR to allow superadmins to see meeting-edit even if not in the meeting.

[reiterl]

I have updated the way to get the meeting membership. I now use groups. So no need to load the long user_ids list.

[Elblinator]

still needs some discussion and a green light from @emanuelschuetze