Launcher popup fixes
Fixes #40 (closed) This change fixes the problem with the popup not being "undrawn" when we stop Super-Tabbing
It could be re-used for other pop-ups such as volume control, but I have no way (that I know of) to get the volume control popup on qemu and I don't have hardware that works.
Fixes #56 (closed) by also cycling only through the selectable windows.
The window switches is NOT shown if there are 0 or 1 windows to switch between. For 2 or more windows to switch between it will rotate them through the window stack and show the selected one highlighted in text in the popup window.
Edited by Andrew Mackenzie