Commit 355b5eeb authored by Florian Müllner's avatar Florian Müllner Committed by Florian Müllner

workspace: Set offscreen redirect on window previews

Window previews are sometimes shown translucent, for example during
drags or animations. They can also have attached dialogs, in which
case the opacity should affect the combination of all windows instead
of being applied to each window individually, blended together, so
make sure they are redirected as a whole when necessary.

parent 51938c39
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