GTK4: Fix menu action setup by adding code to install group actions into the menu bar or popover menu when it exists. Delay setup until it is available then use the cached parent saved on the menu during subsequent creation.

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