[FIX] account: reconciliation domain

During reconciliation wizard, the wizard tries to find the best match with
exisiting unreconciled lines.
When more than one line could be reconciled with the bank statement line, the
oldest line was not selected.
e.g.
- statemement line: 10€
- invoice 1: 10€
- invoice 2: 10€
- invoice 3: 5€

The statement line was reconciled with the 5€ invoice instead of the first one.
This was due to the domain not matching when the exact same amount was found.

Sign CLA for compassionCH

Closes #8767