With the new steam client updates, the client tries to aggressively
move around several of the widget overlay components, including xp
tracker, and several hp bars. This tends to fight with the layouting we
already do with the widgets.
This changes the widgets to only be layouted if the overlay has a
preferred location or position set. Otherwise, it will offset the snap
corner bounds by where the client has positione the widget.
It is still possible to get the client ui to fight the widget overlay by
moving the overlays around manually, but it should no longer happen in
the default positioning of the widgets.
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