Cleaned up home screen UI

Added back the date to the home screen and cleaned up the software version text for a more classic/cleaner look.

selfdrive/ui/qt/home.h

@@ -33,6 +33,7 @@ private:
   Params params;
 
   QTimer* timer;
+  ElidedLabel* date;
   ElidedLabel* version;
   QStackedLayout* center_layout;
   UpdateAlert *update_widget;