Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58210 Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=38975
Supersedes https://gitlab.winehq.org/wine/wine/-/merge_requests/8013
-- v7: server: Update fill window invalidate rect with window resize. server: Pass NULL as child region if region is NULL. user32/tests: Add tests for NULL invalidated rect with window resize.