ui: emit panel refresh signal from Platform Selector (#891)

selfdrive/ui/sunnypilot/qt/offroad/settings/vehicle/platform_selector.cc

@@ -62,6 +62,7 @@ void PlatformSelector::refresh(bool _offroad) {
     }
   }
   setEnabled(true);
+  emit refreshPanel();
 
   offroad = _offroad;
 }

selfdrive/ui/sunnypilot/qt/offroad/settings/vehicle/platform_selector.h

@@ -19,6 +19,9 @@ public:
 public slots:
   void refresh(bool _offroad);
 
+signals:
+  void refreshPanel();
+
 private:
   void searchPlatforms(const QString &query);
   void setPlatform(const QString &platform = "");