QmlDesigner: Compile fix

Change-Id: Ia3bd03e683ab9a9243d40f07a4b1b4b80026ae20
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qmldesigner/components/formeditor/contentnoteditableindicator.cpp

@@ -31,6 +31,7 @@
 #include "nodemetainfo.h"
 
 #include <QSet>
+#include <QPen>
 
 namespace QmlDesigner {