hal_json_style: prevent a translation of worklist with document count

When viewing the worklist page, a request is made to traverse portal_workflow,
which translate global worklist actions including the document count.

The non regression test was failing with:

    [u'Draft To Validate (1)'] != ['Draft To Validate']

and in real usage, several messages were added to Localizer.
3 jobs for <span class="ref-name">fix/hal_worklist_count</span> in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner1

01:30:12

passed ERP5.PerformanceTest-TestRunner1

00:24:23

failed ERP5.UnitTest-TestRunner1

02:36:38