Order invoice items by SaleItem.te_id

Since the domain changed and doesn't come ordered, the order is random and
can break stoqlib.lib.test_invoice. Workaround that by ordering by
SaleItem.te_id (we should be ordering by sellable's description or code, but
that would need a join with Sellable)

Change-Id: Iafc6fd7fe7c82970b524e0d91e415d7adbd528fe
Use batch selection on initial stock dialog

Change-Id: Ic7f97822eaac05bed76bc8b2dc03c5ed3f69de17
Merge "Order invoice items by SaleItem.te_id"
Merge "Use batch selection on initial stock dialog"