Dialog boxes appearing when I click "save" or "open" in some programs open up on my laptop's small screen instead of on my main external one. I would like them to open on my main display. What defines the position of secondary windows like this ?
I also noticed an issue: if I try to drag those secondary windows from my laptop's display to my main display, it causes the main window to move instead of the secondary one. I have a third party Gnome theme active, could it be the source of the issue?
What might be causing this ?