[Fix] UI bugs, Registrations Mail, BTRules Popup, Legacy API fixes (#309)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#309

templates/objects/edge.html

@@ -14,7 +14,7 @@
     <div class="card bg-base-100">
       <div class="card-body">
         <div class="flex items-center justify-between">
-          <h2 class="card-title text-2xl">{{ edge.edge_label.name }}</h2>
+          <h2 class="card-title text-2xl">{{ edge.get_name }}</h2>
           <div id="actionsButton" class="dropdown dropdown-end hidden">
             <div tabindex="0" role="button" class="btn btn-ghost btn-sm">
               <svg
@@ -45,6 +45,11 @@
             </ul>
           </div>
         </div>
+        <p class="mt-2">
+          The underlying reaction can be found
+          <a href="{{ edge.edge_label.url }}" class="link link-primary">here</a
+          >.
+        </p>
       </div>
     </div>