cmake-gui: default taskbar overlay icon on Windows
Since CMake 3.14.0, a default overlay icon appears in the taskbar on Windows, when using
An attempt to set the overlay icon is made here, although the resource
:/loading.png is never defined and therefore not found, which makes Windows fall back to this default overlay icon. Also, I didn't find any code that would reset the overlay icon after loading, so I'm not sure what the intention was when introducing it.
Removing the line linked above fixes the issue.