1319: Adapt collection editor to new datamodel concept

Task-Url: https://pm.winseda.de/issues/1319

css/application-colreg.css

@@ -310,6 +310,9 @@
   display: none;
   margin-bottom: 0.5rem;
   width: 100%; }
+  .editor-table .editor-list .btn-link {
+    padding-top: 0.875rem;
+    padding-bottom: 0.875rem; }
   .editor-table.has-data {
     display: block; }
     .editor-table.has-data + .btn {