fix broken what links here widget

src/public/app/entities/note_short.js

@@ -481,6 +481,17 @@ class NoteShort {
             .map(attributeId => this.treeCache.attributes[attributeId]);
     }
 
+    /**
+     * Get relations which target this note
+     *
+     * @returns {NoteShort[]}
+     */
+    async getTargetRelationSourceNotes() {
+        const targetRelations = this.getTargetRelations();
+
+        return await this.treeCache.getNotes(targetRelations.map(tr => tr.noteId));
+    }
+
     /**
      * Return note complement which is most importantly note's content
      *