QetGraphicsTableItem : add dialog to inform user

When user edit the query of an existing table/s if the content to
display is bigger than the content who can be displayed by the table/s a
dialog is opened for inform user of the current situation.

sources/qetgraphicsitem/ViewItem/qetgraphicstableitem.h

@@ -48,6 +48,7 @@ class QetGraphicsTableItem : public QetGraphicsItem
 
 	public :
 		static void adjustTableToFolio(QetGraphicsTableItem *table, QMargins margins = QMargins(20,20,20,0));
+		static void checkInsufficientRowsCount(QetGraphicsTableItem *first_table);
 
     public:
         QetGraphicsTableItem(QGraphicsItem *parent= nullptr);