mici ui: add interaction timeout fixme + fix navwidget guard

selfdrive/ui/mici/layouts/main.py

@@ -92,6 +92,7 @@ class MiciMainLayout(Scroller):
       else:
         self._scroll_to(self._home_layout)
 
+    # FIXME: these two pops can interrupt user interacting in the settings
     if self._onroad_time_delay is not None and rl.get_time() - self._onroad_time_delay >= ONROAD_DELAY:
       gui_app.pop_widgets_to(self)
       self._scroll_to(self._onroad_layout)