Revert "Try to make titlebar removal work"

This reverts commit 50c8e87f8b001bd15b1d8d5908d0b4a46d8ef4bf.

The above commit tries to issue glade commands from the
GladeWidgetAdaptor methods for applying property values
to the runtime widgets, instead I'm adding a commit which
groups the 'use-csd' property setting with the titlebar
deletion.
GladeWindowEditor: Added custom control for client side decorations

This is needed so that when the command is issued, it can also
include the child deletion as a part of the command group.