Please! rollback or fix!
Since last update (now: Version 115.13.0esr) the mail/list window or its elements
losing focus on any action I.e. after deleting a message, focus doesn't changed to
the next message - not even it stays in the same window-element! You have to set
the focus manually with a mouse-click. And moreover selecting another (i.e. also
to be deleted message) the state jumps: selcted/active (blue) > selected/inactive (grey)
So you have to click again...
