Keep up to date the label of element when folio position change (Formula contain %id)

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@4744 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/qetgraphicsitem/masterelement.h

@@ -43,6 +43,9 @@ class MasterElement : public CustomElement
 	
 	signals:
 
+	private:
+		void folioIdChange();
+
 	public slots:
 		void updateLabel(DiagramContext old_info, DiagramContext new_info);
 		void changeElementInfo();