Check QMLType when adding new QML files to project to prevent error message being shown

Change-Id: I68df3c69b535d47109bfb94c3089fd78e8b3683d
Reviewed-on: http://codereview.qt.nokia.com/514
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/plugins/qmlprojectmanager/fileformat/filefilteritems.cpp

@@ -213,7 +213,7 @@ QString FileFilterBaseItem::absoluteDir() const
         absoluteDir = m_defaultDir + QLatin1Char('/') + m_rootDir;
     }
 
-    return absoluteDir;
+    return QDir::cleanPath(absoluteDir);
 }
 
 void FileFilterBaseItem::updateFileList()