2490a2ffda
Since a11f417cd0f9876b6e00731a6e39665d0103336f, both drag and scroll gestures are added to Main.layoutManager.overviewGroup actor, while previously drag gesture was added to Main.overview._backgroundGroup instead. Since we cannot use 2 different actors for dragging and scrolling anymore. just disable the swipe tracker while dragging a window. https://gitlab.gnome.org/GNOME/gnome-shell/issues/2151