qt: Add fullscreen status icons support and option

src/unix/unix.c

@@ -48,6 +48,7 @@ extern wchar_t sdl_win_title[512];
 plat_joystick_t	plat_joystick_state[MAX_PLAT_JOYSTICKS];
 joystick_t	joystick_state[MAX_JOYSTICKS];
 int		joysticks_present;
+int		status_icons_fullscreen = 0; /* unused. */
 SDL_mutex *blitmtx;
 SDL_threadID eventthread;
 static int exit_event = 0;
@@ -1272,4 +1273,4 @@ void endblit()
 void
 ui_sb_mt32lcd(char* str)
 {
-}
+}