[BUG] new tab button does not open always grouped but opens new window
This doesnt happen with all apps but a few. For example JpegView ( https://sourceforge.net/projects/jpegview/ ).
1. open instance of JpegView
2. open a 2nd window
3. bring them together
4. click new tab button
5. new window of JpegView appears not in the group
There is also another bug, if you click the new tab button, it opens the file the current instance which had focus was opened with. This is really annoying. If this is by design, please add an option to deactvate this. New Tab should always open a blank instance.