Through the web editing of Tracker and Issue Dexterity Fields is broken

[abosio]

Version 3.0

Clicking on the Fields tab of Tracker or Issue in Dexterity Content Types in Site Setup yields the following error. In any case, the option values for the Areas, Issue Types and Severities fields can vary from one Tracker object to another, so it is not obvious what the solution would be for this tab.

Traceback (innermost last):
  Module ZPublisher.Publish, line 138, in publish
  Module ZPublisher.mapply, line 77, in mapply
  Module Products.PDBDebugMode.runcall, line 70, in pdb_runcall
  Module ZPublisher.Publish, line 48, in call_object
  Module plone.z3cform.layout, line 66, in __call__
  Module plone.z3cform.layout, line 50, in update
  Module plone.z3cform.fieldsets.extensible, line 59, in update
  Module plone.z3cform.patch, line 30, in GroupForm_update
  Module z3c.form.group, line 132, in update
  Module z3c.form.form, line 136, in updateWidgets
  Module z3c.form.field, line 277, in update
  Module z3c.form.browser.select, line 51, in update
  Module z3c.form.browser.widget, line 171, in update
  Module z3c.form.widget, line 233, in update
  Module z3c.form.widget, line 227, in updateTerms
  Module zope.component._api, line 107, in getMultiAdapter
  Module zope.component._api, line 120, in queryMultiAdapter
  Module zope.component.registry, line 238, in queryMultiAdapter
  Module zope.interface.adapter, line 532, in queryMultiAdapter
  Module z3c.form.term, line 104, in ChoiceTerms
  Module zope.schema._field, line 309, in bind
  Module Products.Poi.content.tracker, line 117, in possibleSeverities
AttributeError: getTracker

[abosio]

Hiding the Fields tabs to prevent user encountering the error.