[FIX] account_aged_partner_balance: accurate total

In some cases when the move was partially reconciled, the amount of the move wasn't added to the total
This is related to rev. abe5c803a0e36f18aec4cc56abc289f66329a749
[FIX] purchase: cancel lines when cancel purchase order

Backport of 8.0 behaviour.
When canceling a purchase.order, change also the state of the lines and linked procurements.
Fixes #4168
[IMP] purchase: remove useless name_get

because why???