PWA client: Add an optional list of meeting bookmarks

I have a few recurring meetings that I join from time to time.

These are not meetings that I set up myself, but meetings that other people have set up.

As such, they do not appear in the client's tab My meetings.

As long as I'm joining these meetings often enough, I can access them via the Recent meetings tab.

However, one I skip a meeting for too long, there does not seem to be a way to access that meeting any more.

My suggestion is to provide an optional list of meetings or meeting bookmarks that can be edited by the user.

Either as part of the My meetings tab, or as a fourth tab in the meeting GUI.

The elements of this list would then be clickable to allow the user to join the meeting.