[PATCH v2 0/4] MR5784: win32u: Fix a couple of window surface regressions.

[Rémi Bernon (＠rbernon)]

Fixes a regression from 5d0efbcc6e88e2b7886f2a0cfb58c9100b452160, and 0d2fa879d735cd39e72c15014686001c13a089b8 (https://bugs.winehq.org/show_bug.cgi?id=56766).

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  v2: win32u: Get rid of move_window_bits_parent, using move_window_bits.
      win32u: Don't map points to the parent window in move_window_bits_parent.
      win32u: Use a dedicated helper to move bits from a previous surface.
      win32u: Restore surface rect, which may offsetted from the window rect.

https://gitlab.winehq.org/wine/wine/-/merge_requests/5784