Advanced settings dialog does not close after pressing OK
When pressing OK in the advanced settings dialog, the window becomes transparent but is still displayed on top of the menus. Clicking advanced settings again leads to general unresponsiveness of the menu controls.
See attached screenshot provided by Mirio: https://gitlab.com/uploads/xonotic/xonotic-data.pk3dir/3f8800fea3/adv.png
git-bisect shows that commit 85500767 broke the advanced settings dialog. I'm assigning this to @terencehill as he authored this commit.