Allow editing of poll groups

[dartcafe]

⚠️ This issue respects the following points: ⚠️

• I agree to follow Nextcloud's Code of Conduct.

Describe the goal you'd like to achieve

As a creator of a poll group, I want to be able to

• edit the group title,
• add an extendet title and
• a description for the poll overview

Describe possible solutions

No response

Additional context

No response

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.