[REF] improves the charting code by using get_rows_depth and get_columns_depth methods (addon web_graph)
[REF] improves the charting code by using get_rows_depth and get_columns_depth methods (addon web_graph)

havt/openerp-web,havt/openerp-web,havt/openerp-web,havt/openerp-web,havt/openerp-web