Previously, only the direct parent were taken into account.
Popups like contextual menus could stay open if an ancestor which is
not a direct parent was focused.
Reproduction steps (any platform):
- Select a node in the scene tree
- Left click the node to start renaming
- Right click to open the copy/paste contextual menu
- Left click in the scene tree to deselect the node
Also closing popup when focusing out of the application, without waiting
for the parent to get focus to do so.
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