erp5_trade: add product line selection in stock report

See merge request !1628
6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

01:01:47

passed ERP5.PerformanceTest-Master

00:26:54

failed ERP5.UnitTest-Master

01:25:06

failed ERP5.UnitTest-Master.Medusa

01:21:27

passed SlapOS.Eggs.UnitTest-Master.Python2

00:12:10

passed SlapOS.Eggs.UnitTest-Master.Python3

00:16:19