Minimize button does not work correctly on a border-less applications

Steps to reproduce

1. Compile GTK3/MacOS
2. Run gtk3-demo
3. Click on "Minimize" button

Current behavior

Nothing would happens, app will stay foreground

Expected outcome

App should minimize (iconify)

Version information

3.24.10

Additional information

Actually issue is coming from gdk_quartz_window_iconify - [impl->toplevel miniaturize:nil] which does not work if GDK_QUARTZ_MINIATURIZABLE_WINDOW style bit is not set on window. Initially gdk sets it, but later its reset by gdk_quartz_window_set_decorations(0) call. My patch adds GDK_QUARTZ_MINIATURIZABLE_WINDOW in this case to fix this functionality