private void toolStripMenuItemInsertQuantity_Click(object sender, EventArgs e)
{
DocQuantitySet docPset = (DocQuantitySet)this.treeView.SelectedNode.Tag;
DocQuantity docProp = new DocQuantity();
docPset.Quantities.Add(docProp);
docProp.QuantityType = DocQuantityTemplateTypeEnum.Q_COUNT;
this.treeView.SelectedNode = this.LoadNode(this.treeView.SelectedNode, docProp, docProp.Name, false);
this.toolStripMenuItemEditRename_Click(sender, e);
}