Thanks for the report Dominik. Would you mind filing an upstream bug at https://bugzilla.mozilla.org/enter_bug.cgi#h=dupes%7CCalendar, and sharing the link to it here?
** Changed in: thunderbird (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1869470 Title: Can't minimize Thunderbird Lightning reminder window Status in thunderbird package in Ubuntu: Confirmed Bug description: Ever since Ubuntu moved back to Gnome from Unity, it's impossible to minimize the Thunderbird Lightning reminder window. It's really annoying, the window is always on top of Thunderbird and has to be constantly moved around to use the program. Closing the window makes no sense as a) it tends to start syncing the events with reminders, which can show conflict prompts requiring even more work from the user and b) the window comes back very quickly. So, minimize makes the most sense. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1869470/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
