Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55146
When virtual desktop mode is used, the current host display mode is still written to the registry, before the desktop is created and virtual desktop mode decided. When it matches the virtual screen size it also triggers the virtual desktop fullscreen detection and the window is resized to cover the entire screen.
Instead, when virtual desktop is used, update the current display mode to match the desktop window size.