Quit application after last window closed

writeas/AppDelegate.swift

@@ -42,7 +42,11 @@ class AppDelegate: NSObject, NSApplicationDelegate {
     func applicationWillTerminate(_ aNotification: Notification) {
         vc?.saveDocument()
     }
-    
+
+    func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
+        return true
+    }
+
     func applicationDidBecomeActive(_ notification: Notification) {
         if vc == nil {
             vc = NSApplication.shared().mainWindow?.contentViewController as? ViewController