Ref T659, login dialog to test new login design

* mockup for login dialog
* can be used with SHIFT key

src/blackgui/components/logindialog.h

@@ -0,0 +1,43 @@
+/* Copyright (C) 2019
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution. No part of swift project, including this file, may be copied, modified, propagated,
+ * or distributed except according to the terms contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKGUI_COMPONENTS_LOGINDIALOG_H
+#define BLACKGUI_COMPONENTS_LOGINDIALOG_H
+
+#include "blackgui/blackguiexport.h"
+#include "blackmisc/aviation/airport.h"
+#include <QDialog>
+#include <QScopedPointer>
+
+namespace Ui { class CLoginDialog; }
+namespace BlackGui
+{
+    namespace Components
+    {
+        //! Login dialog
+        class BLACKGUI_EXPORT CLoginDialog : public QDialog
+        {
+            Q_OBJECT
+
+        public:
+            //! Constructor
+            explicit CLoginDialog(QWidget *parent = nullptr);
+
+            //! Destructor
+            virtual ~CLoginDialog() override;
+
+        private:
+            QScopedPointer<Ui::CLoginDialog> ui;
+        };
+
+    } // ns
+}// ns
+
+#endif // guard