[PATCH v2 0/2] MR2571: Some improvements for appwiz.cpl.

[Jactry Zeng (＠jactry)]

In the current implementation, the main UI will be blocked
after the uninstaller is launched. Put the uninstall process
in a thread to avoid that, and popup a message while trying
to launch multiple uninstallers.

--
  v2: appwiz.cpl: Handle WM_CLOSE and WM_COMMAND(IDCANCEL) in the support info dialog.
      appwiz.cpl: Process messages while waiting for the uninstaller to terminate.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/2571