Wayland: add DARKTABLE_HIDE_TITLEBAR_ON_MAXIMIZE to disable TitleBar for Unite compatibility#19694

vtyrtov wants to merge 2 commits intodarktable-org:masterdarktable-org/darktable:masterfrom

vtyrtov:pr/wayland-titlebar-hint-cleanvtyrtov/darktable:pr/wayland-titlebar-hint-cleanCopy head branch name to clipboard