[PATCH 0/2] MR10307: comctl32/tab: Use a clip region to protect the tab item background.

[Zhiyi Zhang (＠zhiyi)]

Use a clip region to protect the tab item background when drawing the text of an owner-draw tab
control. This partially reverts 0d173d01. Tests show that the top edge of the rcItem in DRAWITEMSTRUCT
shouldn't be added 2 pixels for a owner-draw tab, and the tab item background can't be overwritten
when painting the text, which suggests the presence of a clip region.

Fix the text position being off by 2 pixels for an application, which uses the rcItem in
DRAWITEMSTRUCT to calculate text position.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/10307