Table can be splitted and and row number limited

1.Table can have a name.
2.User can define the maximum row to display.
3.Table can be linked together, this is useful when there is a large
data to display in a single table.

Point 1, 2 and 3 work like this :

-Name a table (point 1).
-Limit the number of row to display to fit the table into a diagram
(point 2).
-Create a second table in a new folio.
-Link the second table to first table, you can search by table name
(point 3).
-the new table start to display where the first table end.
The number of linked table is unlimited.

sources/qetgraphicsitem/ViewItem/ui/nomenclaturemodelpropertieswidget.cpp

@@ -33,9 +33,7 @@ NomenclatureModelPropertiesWidget::NomenclatureModelPropertiesWidget(Nomenclatur
     ui(new Ui::NomenclatureModelPropertiesWidget)
 {
     ui->setupUi(this);
-    if (model) {
-        setModel(model);
-    }
+	setModel(model);
 }
 
 /**
@@ -51,6 +49,8 @@ NomenclatureModelPropertiesWidget::~NomenclatureModelPropertiesWidget() {
  */
 void NomenclatureModelPropertiesWidget::setModel(NomenclatureModel *model) {
     m_model = model;
+	ui->m_edit_query_pb->setEnabled(m_model);
+	ui->m_refresh_pb->setEnabled(m_model);
 }
 
 /**