Bitcoin-Qt: massive header and cpp cleanup

- try to enforce the same style to all Qt related files
- remove unneeded includes from the files
- add missing Q_OBJECT, QT_BEGIN_NAMESPACE / QT_END_NAMESPACE
- prepares for a pull-req to include Qt5 compatibility

src/qt/monitoreddatamapper.h

@@ -13,19 +13,18 @@ QT_END_NAMESPACE
 class MonitoredDataMapper : public QDataWidgetMapper
 {
     Q_OBJECT
+
 public:
     explicit MonitoredDataMapper(QObject *parent=0);
 
     void addMapping(QWidget *widget, int section);
     void addMapping(QWidget *widget, int section, const QByteArray &propertyName);
+
 private:
     void addChangeMonitor(QWidget *widget);
 
 signals:
     void viewModified();
-
 };
 
-
-
 #endif // MONITOREDDATAMAPPER_H