Also minimise activity hurricane by calling expand directly.

Open Orders are searched using indexation timestamp, which allows to see them
in "windows", and does not repeat expand if not needed.

Conflicts:
	bt5/erp5_open_trade/SkinTemplateItem/portal_skins/erp5_open_trade/OpenOrder_updateSimulation.xml
	bt5/erp5_open_trade/bt/revision