RFC: Change repeat mode UX

Reason for the change

Currently the buttons' tooltips show you the current mode, which is a bit inconsistent since generally tooltips show you what will happen when you press a button, not the current state.

This commit changes that, and to prevent user confusion, a passivenotification shows the mode that was just switched to.

RFC because I'm not sure this is a better UX. It feels more awkward to me than the status quo. @teams/vdg @teams/usability opinions are welcome.

Test plan

Click the repeat button on the toolbar and see what happens

Screenshots or screen recordings

Bugs fixed

BUG: 475906 FIXED-IN: 24.02