[6.1] [7.0] [saas-1] mrp_repair: create invoice button does not update the view

To reproduce:

Go to runbot with version 6.1, 7.0 or saas-1.

* Find the repair order that is already there (demo data) with invoice method = after repair.
* Go through the workflow.
* When you press the Create Invoice button, nothing happens.
* In fact, the state changed and the invoice was created, but the view is not updated.

A blame shows that this was already fixed here:
http://bazaar.launchpad.net/~openerp/openobject-addons/trunk/revision/8695.1.2

I need to backport the fix to 6.1 and 7.0.

Thanks!