Use payment conditions in "create related payment" action

To ease "manual" (ie. not from payment rule simulation) creation of payments,
update "create relate payment" so that it suggests the payment mode and the
payment date from payment conditions of the invoice's trade condition.

See merge request !1369
6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

01:28:35

passed ERP5.PerformanceTest-Master

00:23:05

failed ERP5.UnitTest-Master

04:13:56

failed ERP5.UnitTest-Master.Medusa

02:38:50

passed SlapOS.Eggs.UnitTest-Master.Python2

00:17:51

passed SlapOS.Eggs.UnitTest-Master.Python3

00:27:53