(XLoadQueryFont) [USE_ATSUI]: Set FMFontFamily value

(XLoadQueryFont) [USE_ATSUI]: Set FMFontFamily value
to font->mac_fontnum.
[USE_MAC_FONT_PANEL] (mac_set_font_info_for_selection): New function.
(x_new_focus_frame) [USE_MAC_FONT_PANEL]: Use it.
(QCfamily, QCweight, QCslant, Qnormal, Qbold, Qitalic): Add extern.
(QWindow) [MAC_OSX]: Likewise.
(Qfont) [USE_MAC_FONT_PANEL]: Likewise.
(Vmac_atsu_font_table) [USE_ATSUI]: New variable.
(syms_of_macterm) [USE_ATSUI]: Defvar it.
(Qtoolbar_switch_mode) [MAC_OSX]: New variable.
(Qpanel_closed, Qselection) [USE_MAC_FONT_PANEL]: Likewise.
(syms_of_macterm): Intern and staticpro them.
(init_font_name_table) [USE_ATSUI]: Set data to Vmac_atsu_font_table.
[TARGET_API_MAC_CARBON] (mac_store_event_ref_as_apple_event): New
function.
[USE_CARBON_EVENTS] (mac_handle_command_event): Use it.
[MAC_OSX] (mac_store_services_event): Likewise.
[USE_CARBON_EVENTS] (mac_handle_window_event) [MAC_OSX]: Handle
kEventWindowToolbarSwitchMode event.
(install_window_handler) [USE_CARBON_EVENTS && MAC_OSX]: Register it.
[MAC_OSX] (mac_store_services_event): Change return type to OSStatus.
[USE_MAC_FONT_PANEL] (mac_handle_font_event): New function.
(install_window_handler) [USE_MAC_FONT_PANEL]: Install it.
(XTread_socket): Select window on mouse click if x_focus_frame is NULL.