Bug#744249: libgtk-3-0: gtk 3.12 breaks usability by forcing client side decorations on X11

[Tsu Jan]

On Wed, 1 Oct 2014 17:43:53 +0300 (EEST) Matti Hamalainen <ccr at tnsp.org> 
wrote: 
> With that patch, even gnome-calculator submits to not using CSD. The patch 
> may have some redundant sections, but it's difficult to know what is
> necessary and what is not without deeper understanding of the 
> CSD/headerbar logic (which I have no time nor patience for, sorry.)

I think returning FALSE from gtk_window_supports_csd() in gtkwindow.c is 
enough, although I haven't tested GTK-3.14 yet.