private void AddNewDocTypeButton_Click(object sender, RoutedEventArgs e)
{
DatabaseHandler.CreateNewDocType(NewDocTypeName.Text);
NewDocTypeName.Text = "";
TypeTable newType = DatabaseHandler.GetLatestDocumentType();
docTypes.Add(newType);
newType.number = docTypes.Count;
DocumentTypeList.Items.Refresh();
//TODO UPDATE DOCUMENTS PAGE
updateDocumentTypesHandler.Invoke();
}