0c2037875a
The correct way to make an actor having the same size as another is a ClutterBindConstraint. Connecting to 'allocation-changed' fails because the allocation might not change even when 'width' and 'height' properties do. This is the case of Main.uiGroup, used as parent container for zoomed window clones. In lightbox.js we bind also the position because in principle it could change, even if currently only fullscreen lightboxes are used.
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