[Bug 46441] Steam shows an extra icon when minimizing window

https://bugs.winehq.org/show_bug.cgi?id=46441

--- Comment #4 from Olivier F. R. Dierick  ---
I tested with notepad alone :
- There is no taskbar.
- Minimizing notepad puts an icon with its label in the bottom right corner.
- Notepad can be restored through the icon.

I tested Notepad + Steam:
- Minimizing notepad doesn't display any icon.
- While the taskbar is visible, one can restore notepad by clicking on the
window button on the taskbar.
- After closing Steam, the taskbar hides itself;
- Notepad still doesn't minimize to an icon.
- The only way to restore notepad is to launch taskmgr(or any app that puts an
icon in the systray) in the same wineserver instance, and the taskbar will
reappear.

I think there is more than one issue with the 'minimize to icon' handling.