Added undo and redo

CircuitCoder · CircuitCoder · commit 23fcc9c83297 · 2016-08-29T14:05:33.000+08:00
diff --git a/util.js b/util.js
@@ -16,6 +16,9 @@ function getControllerMenu() {
     {
       label: 'Edit',
       submenu: [
+        { role: 'undo' },
+        { role: 'redo' },
+        { type: 'separator' },
         { role: 'cut' },
         { role: 'copy' },
         { role: 'paste' },
