context menu cleanup

src/public/javascripts/services/tree_context_menu.js

@@ -141,7 +141,8 @@ async function getContextMenuItems(event) {
 }
 
 function selectContextMenuItem(event, cmd) {
-    const node = $.ui.fancytree.getNode(event);
+    // context menu is always triggered on current node
+    const node = treeService.getCurrentNode();
 
     if (cmd === "insertNoteHere") {
         const parentNoteId = node.data.parentNoteId;

src/views/index.ejs

@@ -802,8 +802,6 @@
     <script src="/libraries/jquery.hotkeys.js"></script>
     <script src="/libraries/jquery.fancytree.hotkeys.js"></script>
 
-    <script src="/libraries/jquery.ui-contextmenu.min.js"></script>
-
     <script src="/libraries/knockout.min.js"></script>
 
     <link href="/stylesheets/style.css" rel="stylesheet">