Provide a way to mark Polls as Close and visible in page#24

At the moment the surveys and polls can have only two statuses: Active and Archived (Trash).
Archiving also removes it from the pages including the visualisations.

It would be very nice if the surveys and polls can be closed, with that no new responses will be collected.
But it will be still possible to show the results on a page for a long time.

Also it would make sense to have two tabs in the list of “My Forms” so see the active ones and if needed to closed ones.