On Windows, hiding a maximized window, unmaximizes instead

[amrbashir]

Steps to reproduce:

1. cargo run --example window_debug
2. press x to maximize the window
3. press v to hide it

Bug:

The window isn't hidden and isn't responsive. The window actually restored its original unmaximized size instead. The window icon is removed from the taskbar.

Expected:

The window is hidden, the window icon is removed from the taskbar and the window doesn't restore to its original unmaximized size.