New option: Show only winning Answer

[mglavind]

We use humhub as an internal social network for a large dorm in Copenhagen.
We would like to use the poll system to vote for candidates, but we have a clause that a "secret poll" can be asked for, which means that only the result is shown.

Example: election for board president: Mary or Alex.
Mary gets 112 votes and Alex gets 2.

This result can make Alex feel bad, and create social tension at the dorm. Therefore we would like to just show the result: Mary won the election.
Maybe the result could be only visible for the poll creator only.