refactoring qad widgets part 2

c++ cast, nullptr, forward declaration, agregate ui, connect to member functions, order and clear includes

libs/widgets/propertystorage_editor.h

@@ -21,29 +21,30 @@
 #define PROPERTYSTORAGEEDITOR_H
 
 #include <QWidget>
-#include "propertystorage.h"
 #include "qad_widgets_export.h"
 
 
+class PropertyStorage;
+
+
 class QAD_WIDGETS_EXPORT PropertyStorageEditor: public QWidget {
 	Q_OBJECT
 public:
-	explicit PropertyStorageEditor(QWidget * parent = 0);
-	~PropertyStorageEditor();
+	explicit PropertyStorageEditor(QWidget * parent = nullptr);
+	~PropertyStorageEditor() override;
 	
 	void clear();
 	bool isEmpty() const;
 	void setStorage(PropertyStorage * s);
 	void applyProperties();
 	
-private:
-	QList<QWidget*> _widgets;
-	PropertyStorage * storage;
-	
 signals:
 	void resetStorageRequest(PropertyStorage * );
 	void changed();
 
+private:
+	QList<QWidget*> _widgets;
+	PropertyStorage * storage;
 };
 
 #endif // PROPERTYSTORAGEEDITOR_H