[PATCH v2 0/2] MR5634: win32u: Ignore WM_MOUSEMOVE when tracking scrollbar and arrow/track is clicked

[Fabian Maurer (＠DarkShadow44)]

This fixes a regression from bb496ea8.
Also closer mimics windows behavior, moving the mouse
should not reset the scrolling timer.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56582

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  v2: win32u: Only set scroll timer if it's not running
      win32u: Refactor out scroll timer handling

https://gitlab.winehq.org/wine/wine/-/merge_requests/5634