overviewControls: Make the swipe up gesture workspace move with finger
Since we now have a gesture where workspaces can be "pushed up" from the bottom screen edge, it makes sense to move the workspaces in sync with the finger movement. To achieve this, we change the swipeTracker distance as soon as the threshold of the state WINDOW_PICKER is reached. This isn't perfect though: The one progress change that crossed the threshold will still use the old distance, even though a part of that progress changed should have used the new distance. This can lead to the workspace getting out of sync with the finger movement when moving the finger quickly.