Create window on macOS activate app event

Yukaii · Yukaii · commit 91abf2261f5e · 2017-03-25T16:46:56.000+08:00
diff --git a/main.js b/main.js
@@ -20,3 +20,7 @@ app.on('window-all-closed', () => {
     app.quit()
   }
 })
+
+app.on('activate', () => {
+  initializeApp()
+})
