wmaker: do not remove Title Bar for windows that declare themselves as Toolbar or Tear-off menu
As pointed by Germán Arias, some windows in GNUstep did not have a title
bar because they declare themselves with the NET_WM type MENU.
A closer look at the spec shows that this type is meant for stuff like tear
off menus, and thus like for toolbar it is not expected that the
application does not want a titlebar, as opposite to DROPDOWN_MENU,
POPUP_MENU and COMBO.
So, this patch moves the case for TYPE_MENU to be the same as TYPE_TOOLBAR
and remove the flag that disables having a title bar.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>