UI files: Do not polute the global Ui namespace

Make sure all ui-files are in the plugin's internal namespace.

Change-Id: Ifb2c3093441e8feb89e46f52fbb386fc316cfd13
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/cpaster/pasteview.h

@@ -86,7 +86,7 @@ private:
     const QString m_commentPlaceHolder;
     const QString m_mimeType;
 
-    Ui::ViewDialog m_ui;
+    Internal::Ui::ViewDialog m_ui;
     FileDataList m_parts;
     Mode m_mode;
 };