Separate app ad and upload button

Author: stefanw

fragdenstaat_de/templates/scannerapp/postupload.html

@@ -15,3 +15,4 @@
 <div class="d-md-none text-center mb-3">
     <a href="{{ app_url }}" class="btn btn-primary btn-lg btn-block">{% translate "Open FragDenStaat Scanner App" %}</a>
 </div>
+<hr class="d-md-none">