refs #471, removed old info window and migrated to overlay widget

* added small message display (more suitable for swift GUI)
* fixed nullptr bug with ESC key
* adjusted swift GUI

src/blackgui/statusmessageformsmall.h

@@ -0,0 +1,52 @@
+/* Copyright (C) 2015
+ * 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 and at http://www.swift-project.org/license.html. 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_STATUSMESSAGEFORMSMALL_H
+#define BLACKGUI_STATUSMESSAGEFORMSMALL_H
+
+#include "blackgui/blackguiexport.h"
+#include "blackmisc/statusmessage.h"
+#include <QFrame>
+
+namespace Ui { class CStatusMessageFormSmall; }
+
+namespace BlackGui
+{
+    /*!
+     * Display details about a single status message
+     */
+    class BLACKGUI_EXPORT CStatusMessageFormSmall : public QFrame
+    {
+        Q_OBJECT
+
+    public:
+        //! Constructor
+        explicit CStatusMessageFormSmall(QWidget *parent = nullptr);
+
+        //! Destructor
+        ~CStatusMessageFormSmall();
+
+    public slots:
+        //! Set message
+        void setVariant(const BlackMisc::CVariant &messageVariant);
+
+        //! Set message
+        void setValue(const BlackMisc::CStatusMessage &message);
+
+        //! Toggle visibility
+        void toggleVisibility();
+
+    private:
+        QScopedPointer<Ui::CStatusMessageFormSmall> ui;
+    };
+
+} // ns
+#endif // guard