
Replace existing four-finger gestures with SwipeTracker. Since TouchpadWorkspaceSwitchAction and WorkspaceSwitchAction are now unused, remove them. Change programmatic workspace transition to use easeOutCubic interpolator to match the gesture. Fixes https://gitlab.gnome.org/GNOME/gnome-shell/issues/756 https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/826