Make duplicate-from mandatory, if 'required_duplicate_from' is set

[reiterl]

Resolve #3804

Needs OpenSlides/openslides-backend#2524
and an updated autoupdate service

[Elblinator]

the issue from the autoupdate
OpenSlides/openslides-autoupdate-service#959

[Elblinator]

I'm testing this right now, I need to wait for the meta :D

but please fix the tests

[reiterl]

I think, for the tests this needs the backend and meta pr merged.

[Elblinator]

A change request:

• A committee admin should be able to set themselves as a meeting admin even if this setting is activated
  Reproduction:

1. Create a meeting where the committee admin is not an admin from the meeting
2. activate the new setting
3. login as the committee admin
4. start editing this meeting
5. you can select yourself as an admin but you cannot save the meeting

Some requirements were not documented and now need some implementing in this PR:
If the new setting is activated then (only for the committee admin)....

• The button to turn a meeting into a template/ turn a meeting not into a meeting should be hidden
• The option to duplicate a meeting should be hidden

[MSoeb]

Issue I've found:

• Meeting creation with or without the new function activated creates two error messages in the console. The creation works, but the creation mask isn't closed after saving it. Tried it as superadmin and committee admin. Doesn't worked properly for both admins.

Here the error messages:

Reproduction as superadmin:

1. open committee > create a committee
2. open dev-console
3. create a meeting in the committee -> error messages will appear and the creation doesn't closed automatically.

What should happen:

1. Creation mask should close itself by saving it and open the committee detail page
2. error messages should not appear in console

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Please change the texts of the new function from

• "Activate require templates for creating a meeting" to 'Enable meeting creation from templates only'
• 'If this setting is active committee-admins can only create meetings from public meeting templates, to enable these admins to create a meeting you need to create a template meeting first' to 'If this setting is activated, public meeting templates must have been created, as committee administrators can only create meetings based on public templates.'

[MSoeb]

Loading bugs are gone, but the text ajdustments need to be done. They are located in the general instance settings:

• "Activate require templates for creating a meeting" to 'Enable meeting creation from templates only'

• 'If this setting is active committee-admins can only create meetings from public meeting templates, to enable these admins to create a meeting you need to create a template meeting first' to 'If this setting is activated, public meeting templates must have been created, as committee administrators can only create meetings based on public templates.'

---

Additionally:
If the setting is activated and a committee admin wants to create a meeting from templates, a non-essential element, a dash, is displayed in the 'Duplicate from' selection. I have circled these in red in the image below.

What should happen?
If the new setting is activated, committee admins should only see templates in the 'Duplicate from' selection, all other information can be deleted as it is unnecessary. Specifically: Please delete the dash option.

[reiterl]

Rename the labels.
Deactivate the includeNone option of the meeting selector.

[reiterl]

Please review again.

[Elblinator]

@MSoeb changes were made and I will dismiss his CR

Changes were made

[reiterl]

Are the AU and meta merges missing?