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window-actor/wayland: Handle too large fullscreen surfaces better

Sebastian Keller requested to merge skeller/mutter:fix-surface-larger-than-fullscreen into main

Some clients, such as kitty, can end up with fullscreen surfaces that exceed the size limit set by the compositor, i.e. larger than the screen resolution. Mutter used to place the top left corner of the window geometry of such surfaces at the top left corner of the screen and these clients relied on that. This however got changed as a side effect of 909616b2, which now causes these surfaces to be shifted to far to the top left.

While this client behavior goes against the spec, it is easy enough to work around in Mutter and restore the previous behavior for such fullscreen surfaces that exceed the screen size.

Closes: #2524

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