Always close window on .isVisible = false

E.g. "About" would open main window when launched from login item.

Passepartout/Library/Sources/AppUIMain/Views/AppMenu/AppWindow.swift

@@ -40,16 +40,14 @@ public final class AppWindow {
             if newValue {
                 NSApp.activate(ignoringOtherApps: true)
                 window.makeKeyAndOrderFront(self)
+            } else {
+                window.close()
             }
         }
     }
 
     private init() {
     }
-
-    public func close() {
-        window.close()
-    }
 }
 
 private extension AppWindow {