Swipe back to select a window in multitasking view

### Problem

In multitasking view, you can't select a window just by swiping, but instead need to swipe and click. Swiping to enter multitasking view and then swiping back to select the window would feel more natural.

### Proposal

If you move the cursor onto another window in multitasking view, swiping back should bring that window to front instead of the one selected at the moment.