Highlighted Window overlaps PurpleUI #22
Description
When large areas are highlighted in the Application Under Test, the PurpleUI is covered by the highlight. The user can't click through the highlight back into the purpleUI.
This is because the highlight is actually a transparent window overlayed on the bounding box of the element found with the PurpleUI.
We should add a process to the highlight algorithm to make sure that the PurpleUi is always placed ontop of the Highlight window.