Prevent GUI grab

ui/sdl2.c

@@ -238,6 +238,7 @@ static void sdl_show_cursor(struct sdl2_console *scon)
 
 static void sdl_grab_start(struct sdl2_console *scon)
 {
+    return;
     QemuConsole *con = scon ? scon->dcl.con : NULL;
 
     if (!con || !qemu_console_is_graphic(con)) {