This add support for the different window state in Linux/X11.
Two think to take care:
1) m_post_*
2) motifFullScreen
1) This is only need if we want start a window in FullScreen or Maximized
state. The basic problem is that we can't set this property to a window
until it's really map, so i add a "post init" proccess for this two
special case (check the code for more info).
2) The Motif Hint isn't really a "FullScreen" mode, it's only a
"NO DECORATIONS" options, so if the window manager don't support WM-spec
this function only remove the border of the window, don't make it
FullScreen. A simple fix (hack) is check if the Window Manager support
WM-spec, in case that not, remove the decorations and move/resize the
window.
Test in different WM (gnome, kde, etc) and comment are welcome :)
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