Use directly using namespace MailCommon

src/folder/foldertreewidget.cpp

@@ -39,9 +39,9 @@
 #include <QPointer>
 #include <QVBoxLayout>
 
-namespace MailCommon
+using namespace MailCommon;
-{
+
-class Q_DECL_HIDDEN FolderTreeWidget::FolderTreeWidgetPrivate
+class Q_DECL_HIDDEN MailCommon::FolderTreeWidget::FolderTreeWidgetPrivate
 {
 public:
     QString filter;
@@ -381,4 +381,3 @@ bool FolderTreeWidget::eventFilter(QObject *o, QEvent *e)
     }
     return false;
 }
-}