(w32_wnd_proc) <WM_KILL_FOCUS, WM_EMACS_DESTROY_CARET>: Set it.
<WM_EMACS_TRACK_CARET>: Arrange for system caret to be visible if
the user requests it. Use system default width when creating.
<WM_EMACS_HIDE_CARET, WM_EMACS_SHOW_CARET>: Handle new messages.
(w32_use_visible_system_caret): New user flag.
(syms_of_w32term): DEFVAR_BOOL it. Initialize based on whether
Windows reports a screen reader running.
(x_update_window_begin): Hide the system caret.
(x_update_window_end): Show the system caret.
(x_display_and_set_cursor): Don't draw a cursor when
w32_use_visible_system_caret is set. Do not adjust width.
in place of stricmp.
(w32_list_synthesized_fonts): Removed.
(w32_to_all_x_charsets, enum_font_maybe_add_to_list): New functions.
(struct enumfont_t): New element; list.
(enum_font_cb2): List all style and charset variations of a font.
(Fw32_select_font): New optional argument; include_proportional.
Exclude vertical fonts. Exclude proportional fonts unless
include_proportional is non-nil.
(w32_enable_synthesized_fonts): Change to a boolean.
(Fw32_send_sys_command): Doc fix.
frames.
(do_switch_frame): For termcap frames, switch the tty
color mode as specified by the frame's parameters.
(Qtty_color_mode): New variable.
(syms_of_frame): Intern and staticpro it.
(set_tty_color_mode): New functions.
(term_init): Call tty_default_color_capabilities.
(Qtty_color_mode_alist): New variable.
(syms_of_term): Intern and staticpro it.
(syms_of_xfns): Intern and staticpro them.
(x_frame_parms) <"fullscreen">: New parameter.
(x_fullscreen_move, x_set_fullscreen): New functions.
(x_set_frame_parameters): Support for Qfullscreen.
(x_real_positions): More accurate computation of the frame position.
(x_figure_window_size): Support full-screen frames.
(Fx_create_frame): Default the fullscreen parameter.
(x_fullscreen_adjust): New functions.
(XTread_socket) <Expose>: Call x_check_fullscreen.
<ConfigureNotify>: Don't resize to fullscreen. Call
x_check_fullscreen_move, and set the want_fullscreen member of
output_data.x.
