add 'Format Table' in the File menu

lib/main-menu.js

@@ -136,6 +136,15 @@ const file = {
     {
       type: 'separator'
     },
+    {
+      label: 'Format Table',
+      click () {
+        mainWindow.webContents.send('code:format-table')
+      }
+    },
+    {
+      type: 'separator'
+    },
     {
       label: 'Print',
       accelerator: 'CommandOrControl+P',