89ba8562c3
For drag actors which get reparented to the uiGroup, we currently wait until the next input event to set the fixed position of the actor, until that they will just be allocated their old fixed position, which is 0, 0. So avoid drag actors flickering at the top left for one frame and position them correctly right after reparenting. https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1310