cleanup templates:

- move out shared functions to shared templates
  - remove useless classes
  - simplify
  - various cleanups & enhancements

layouts/anmeldung/list.html

@@ -2,10 +2,8 @@
 
 <section class="section">
   <div class="container">
-    <div class="row mb-4">
-      <div class="col-md-6 content">
-        {{ .Content }}
-      </div>
+    <div class="content">
+      {{ .Content }}
     </div>
     <div class="row">
       {{ range .Params.elements }}