Ref: OM10b / DECOM-32

Depends on #7894
This issue is part of #7723
Follows #7979

Polls in meetings will be able to be managed by admins in the UI the meeting is happenning as seen in the design.

• Users should be able to answer questions
• Admins should be able to see the results of the questions
• Admins should be able to close a question and publish the answers
• Users should be able to see the summary of the answers

All this should happen without users reloading the page