Add "Check for Updates..." menu item

src/main/menus/app.js

@@ -3,7 +3,7 @@
 // See LICENSE.txt for license information.
 'use strict';
 
-import {app, dialog, Menu, shell} from 'electron';
+import {app, dialog, ipcMain, Menu, shell} from 'electron';
 
 import settings from '../../common/settings';
 import buildConfig from '../../common/config/buildConfig';
@@ -230,6 +230,16 @@ function createTemplate(mainWindow, config, isDev) {
   submenu.push({
     label: `Version ${app.getVersion()}`,
     enabled: false,
+  }, {
+    type: 'separator',
+  }, {
+    label: `Version ${app.getVersion()}`,
+    enabled: false,
+  }, {
+    label: 'Check for Updates...',
+    click() {
+      ipcMain.emit('check-for-updates');
+    },
   });
   template.push({label: '&Help', submenu});
   return template;