Add ability to put Gtk+ tool bar on the left/right/bottom or top. Default top.

Add ability to put Gtk+ tool bar on the left/right/bottom or top.  Default top.

* lisp/menu-bar.el (menu-bar-showhide-tool-bar-menu-customize-enable-left)
(menu-bar-showhide-tool-bar-menu-customize-disable)
(menu-bar-showhide-tool-bar-menu-customize-enable-right)
(menu-bar-showhide-tool-bar-menu-customize-enable-top)
(menu-bar-showhide-tool-bar-menu-customize-enable-bottom): New functions
(menu-bar-showhide-tool-bar-menu): If tool bar is moveable,
make a menu for Options => toolbar that can move it.

* src/frame.c (Qtool_bar_position): New variable.
(make_frame): Set tool_bar_position to Qtop.
(frame_parms): Add tool-bar-position.
(x_report_frame_params): Store tool_bar_position.
(x_set_fringe_width): Reset wm size hint after fringe changes.

* src/frame.h (struct frame): Add tool_bar_position.
(Qbottom): Declare.

* src/gtkutil.c (FRAME_TOTAL_PIXEL_WIDTH): New macro.
(xg_frame_set_char_size): Add FRAME_TOOLBAR_WIDTH to pixelwidth.
(xg_height_or_width_changed): Use FRAME_TOTAL_PIXEL_WIDTH.
(xg_create_frame_widgets): Create a hobox for placing widgets
vertically.  Use gtk_box_pack_start.
(xg_height_or_width_changed): Renamed from xg_height_changed.
(x_wm_set_size_hint): Add FRAME_TOOLBAR_WIDTH to base_width.
(xg_update_frame_menubar, free_frame_menubar): Change to
xg_height_or_width_changed.
(xg_tool_bar_detach_callback): Update left/right/top/bottom tool bar
size correctly.  Remove hardcoded 4, instead use handlebox size -
toolbar size.
(xg_tool_bar_attach_callback): Update left/right/top/bottom tool bar
size correctly.  Use handlebox size + toolbar size as additional
size.
(xg_pack_tool_bar): POS is a new parameter.
Set orientation of tool bar based on pos.
Only make handlebox_widget if NULL.
Check if tool bar goes to vbox or hbox depending on pos.
(xg_update_tool_bar_sizes): New function.
(update_frame_tool_bar): Remove old_req, new_req. Do not get tool bar
height, call xg_update_tool_bar_sizes instead.
(free_frame_tool_bar): Remove from hbox or vbox depending on
toolbar_in_hbox,  Set all FRAME_TOOLBAR_*_(WIDTH|HEIGHT) to zero.
(xg_change_toolbar_position): New function.

* src/gtkutil.h (xg_change_toolbar_position): Declare.

* src/window.c (calc_absolute_offset): Check for FRAME_TOOLBAR_TOP_HEIGHT
and FRAME_TOOLBAR_LEFT_WIDTH.

* src/xfns.c (x_set_tool_bar_position): New function.
(xic_set_statusarea): Use FRAME_TOOLBAR_TOP_HEIGHT.
(x_frame_parm_handlers): Add x_set_tool_bar_position.
(syms_of_xfns): if USE_GTK, provide move-toolbar.

* src/xterm.c (x_set_window_size_1): Add FRAME_TOOLBAR_WIDTH to pixelwidth.

* src/xterm.h (struct x_output): Add toolbar_top_height,
toolbar_bottom_height, toolbar_left_width, toolbar_right_width.  Remove
toolbar_height.
if USE_GTK: Add hbox_widget and toolbar_in_hbox.
(FRAME_TOOLBAR_TOP_HEIGHT, FRAME_TOOLBAR_BOTTOM_HEIGHT)
(FRAME_TOOLBAR_LEFT_WIDTH, FRAME_TOOLBAR_RIGHT_WIDTH): New macros.
(FRAME_TOOLBAR_HEIGHT): Is now TOP_HEIGHT + BOTTOM_HEIGHT.