fix delete with keyboard and context menu regarding the selection

src/public/javascripts/services/tree.js

@@ -453,12 +453,6 @@ function initFancyTree(tree) {
     $tree.on('contextmenu', '.fancytree-node', function(e) {
         const node = $.ui.fancytree.getNode(e);
 
-        // right click resets selection to just this node
-        // this is important when e.g. you right click on a note while having different note active
-        // and then click on delete - obviously you want to delete only that one right-clicked
-        node.setSelected(true);
-        clearSelectedNodes();
-
         contextMenuWidget.initContextMenu(e, new TreeContextMenu(node));
 
         return false; // blocks default browser right click menu

src/public/javascripts/services/tree_context_menu.js

@@ -122,7 +122,13 @@ class TreeContextMenu {
             clipboard.pasteInto(this.node);
         }
         else if (cmd === "delete") {
-            treeChangesService.deleteNodes(treeService.getSelectedNodes(true));
+            let notesToDelete = treeService.getSelectedNodes(true);
+
+            if (notesToDelete.length === 0) {
+                notesToDelete.push(this.node);
+            }
+
+            treeChangesService.deleteNodes(notesToDelete);
         }
         else if (cmd === "export") {
             exportDialog.showDialog("subtree");

src/public/javascripts/services/tree_keybindings.js

@@ -7,7 +7,13 @@ import clipboard from "./clipboard.js";
 
 const keyBindings = {
     "del": node => {
-        treeChangesService.deleteNodes(treeService.getSelectedNodes(true));
+        let notesToDelete = treeService.getSelectedNodes(true);
+
+        if (notesToDelete.length === 0) {
+            notesToDelete.push(node);
+        }
+
+        treeChangesService.deleteNodes(notesToDelete);
     },
     "ctrl+up": node => {
         const beforeNode = node.getPrevSibling();