GTK4: Put Xlib calls in GDK_IS_X11_DISPLAY() code checks. Apparently you can build with multiple backends, so this prevents them being called when not using the X11 backend. Functions will do nothing on non-X11 backends currently.

[Desktop Entry]
Name=Dynamic Windows Test
Exec=@prefix@/bin/dwtest 
Terminal=false
MultipleArgs=false
Type=Application
Categories=Application;Development;X-Red-Hat-Base;