Fix SHAppBarMessage (not perfect) by adapting wine code. See CORE-14439.
More work is required. Kept the original code for reference.
Example : SetWindowPos should be called via Post Message.
Code commit is to wake up other developers.
- Rewrite the taskbar settings and start menu settings property sheets.
- All settings in the taskbar settings property sheet can be loaded and saved properly except for the quick launch one which will be implemented later.
- Implement toggling lock, autohide and always on top. The rest will be implemented later.
