[RipleyTom]

This fixes that when you had multiple applications, if you closed one the next one would get the focus under the mouse cursor but the overlay(the X to close it) wouldn't show. This simplifies the hovering logic by using the adhoc hover widget.
The X overlay now correctly appears.

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[jklgrasso]

This change works as expected. Dock appearance settings, closing one or more open windows on the current or another workspace, moving applets I can still close windows, and context menu(s) all work properly.