Global search: Limit search results by user permissions

[MSoeb]

Current behavior
For a user who does not have full access to all meetings, it is possible to find all meetings using a full text search. This is not ideal, as the user a) is shown content that they may not be supposed to see and b) cannot open this content.

Wanted behavior
It would be ideal if users could generally only be shown the content to which they have access via a full-text search. In my opinion, there is no point in displaying content that the user cannot open. In the worst case, the current system would even make content visible that should not be visible.

I therefore think it would make sense if the results of the full-text search were visible in relation to the user authorizations.