Add mutation handling to norm editor; disable socket connection for now

src/app/components/nodes/norm/norm.component.html

@@ -1,7 +1,9 @@
 <div [ngClass]="isDark() ? 'container dark' : 'container'">
     <wysiwyg-editor
+        #wysiwygComponent
         [contents]="contents"
         (contentsChanged)="onContentsChanged($event)"
+        (contentsMutated)="onContentsMutated($event)"
         (selectionChanged)="onSelectionChanged($event)"
         [readonly]="isReadonly"
         [editingUsers]="editorGroupUsers"