erp5_web_js_style: add support for dialog

Only basic fields are supported (no gadgetfield for now).
6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

01:04:41

passed ERP5.PerformanceTest-Master

00:23:42

failed ERP5.UnitTest-Master

02:20:41

failed ERP5.UnitTest-Master.Medusa

02:04:57

passed SlapOS.Eggs.UnitTest-Master.Python2

00:07:43

passed SlapOS.Eggs.UnitTest-Master.Python3

00:29:02