* w32fns.c (w32_frame_parm_handlers): Set 0 for sticky.

* w32fns.c (w32_frame_parm_handlers): Set 0 for sticky.

* nsfns.m (ns_frame_parm_handlers): Ditto.

* frame.c: Declare Qsticky.
(frame_parms): Add sticky.

* xfns.c (x_frame_parm_handlers): Let x_set_sticky handle sticky.

* xterm.h: Declare x_set_sticky.

* xterm.c (x_set_sticky): New function.

* frame.c: Qmaximized is new.
(x_set_frame_parameters): Do not handle fullscreen specially.
Only set width and height if explicitly set.
(x_set_fullscreen): Handle Qmaximized.
(x_set_font, x_figure_window_size): Do not handle fullscreen specially.
(syms_of_frame): Initialize Qmaximized.

* xterm.c (handle_one_xevent): Remove call to x_check_fullscreen
for Expose event. Add call to x_check_fullscreen for MapNotify event.
Remove all code w.r.t. fullscreen from ConfigureNotify event. Do not
set gravity to NorthWestGravity when USE_GTK.
(set_wm_state): New function.
(do_ewmh_fullscreen): Use set_wm_state. Also handle FULLSCREEN_MAXIMIZED.
(x_handle_net_wm_state): Handle FULLSCREEN_MAXIMIZED.
(x_check_fullscreen): Simplify so we only handle EMWH type of fullscreen
or the case when no window manager is running. That means remove calls
to x_real_positions and x_fullscreen_adjust.