Shortcut key reference from help menu is modified.

src/dialog.js

@@ -7,6 +7,37 @@ const file = require('./file');
 const settings = require('./settings');
 
 class Dialog {
+
+  get _keyReferenceInfo() {
+    return [
+      `Add due date: Cmd+Shift+T`,
+      `Add my day: Cmd+K`,
+      `Complete todo: Cmd+Shift+N`,
+      `Delete list: Cmd+Shift+D`,
+      `Delete todo: Cmd+D`,
+      `Global create todo: Cmd+Alt+C`,
+      `Global search todo: Cmd+Alt+F`,
+      `Global toggle window: Cmd+Alt+A`,
+      `Hide todo: Cmd+Shift+H`,
+      `Important: Cmd+I`,
+      `My day: Cmd+M`,
+      `New list: Cmd+L`,
+      `New todo: Cmd+N`,
+      `Planned: Cmd+P`,
+      `Rename list: Cmd+Y`,
+      `Rename todo: Cmd+T`,
+      `Return: Esc`,
+      `Set reminder: Cmd+Shift+E`,
+      `Settings: Cmd+,`,
+      `Sign out: Cmd+Alt+Q`,
+      `Tasks: Cmd+J`,
+      `Toggle black mode: Cmd+B`,
+      `Toggle dark mode: Cmd+H`,
+      `Toggle sepia mode: Cmd+G`,
+      `Toggle sidebar: Cmd+O`
+    ].join('\n');
+  }
+
   get _systemInfo() {
     return [
       `Version: ${app.getVersion()}`,
@@ -18,6 +49,17 @@ class Dialog {
     ].join('\n');
   }
 
+
+  _keyRef() {
+    return this._create({
+      buttons: ['Done', 'Copy'],
+      detail: `Created by Greymond.\n\n${this._keyReferenceInfo}`,
+      message: `Ao ${app.getVersion()} (${os.arch()})`,
+      title: 'Shortcut Key Reference'
+    });
+  } 
+
+
   _about() {
     return this._create({
       buttons: ['Done', 'Copy'],
@@ -79,6 +121,12 @@ class Dialog {
     }
   }
 
+  confirmKey() {
+    if (this._keyRef() === 1) {
+      clipboard.writeText(this._keyReferenceInfo);
+    }
+  }
+
   confirmExit() {
     if (settings.get('requestExitConfirmation')) {
       if (this._exit() === 0) {

src/menu/help.js

@@ -77,7 +77,7 @@ module.exports = {
     }, {
       label: 'Keyboard Shortcuts Reference',
       click() {
-        shell.openExternal(url.keyboardShortcutsRef);
+        dialog.confirmKey();
       }
     }, {
       type: 'separator'