Fix window close behavior (fixes #48)

Secretive/AppDelegate.swift

@@ -29,6 +29,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         window.makeKeyAndOrderFront(nil)
         window.titleVisibility = .hidden
         window.toolbar = toolbar
+        window.isReleasedWhenClosed = false
         if storeList.modifiableStore?.isAvailable ?? false {
             let plus = NSTitlebarAccessoryViewController()
             plus.view = NSButton(image: NSImage(named: NSImage.addTemplateName)!, target: self, action: #selector(add(sender:)))
@@ -42,6 +43,12 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         agentStatusChecker.check()
     }
 
+    func applicationShouldHandleReopen(_ sender: NSApplication, hasVisibleWindows flag: Bool) -> Bool {
+        guard !flag else { return false }
+        window.makeKeyAndOrderFront(self)
+        return true
+    }
+
     @IBAction func add(sender: AnyObject?) {
         var addWindow: NSWindow!
         let addView = CreateSecretView(store: storeList.modifiableStore!) {
@@ -62,6 +69,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
             backing: .buffered, defer: false)
         let setupView = SetupView() { success in
             self.window.endSheet(setupWindow)
+            self.agentStatusChecker.check()
         }
         setupWindow.contentView = NSHostingView(rootView: setupView)
         window.beginSheet(setupWindow, completionHandler: nil)