[PATCH v10 0/3] MR6737: comctl32/toolbar: forward unhandled WM_NOTIFY

[Alanas (＠BZZZZ)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57178

This makes [7-zip file manager](https://www.7-zip.org/) pressing enter while editing path work:
* before:
  * [Icon near path becomes dark (7-zip file manager doesn't go to path).](https://old.reddit.com/r/winehq/comments/16ah3ze/7zip_cant_enter_path_from_p...)
* after:
  * 7-zip file manager goes to path.
  * Path input displays incorrect path (shouldn't happen, bug in wine's comboboxex unrelated to toolbar).

--
  v10: comctl32/toolbar: Forward unhandled WM_NOTIFY.
       comctl32: Move WM_NOTIFY unicode -> ansi conversion code from pager.c to commctrl.c.
       comctl32/tests: Test WM_NOTIFY forwarding in toolbar.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/6737