[Zope] External Editor 0.8 breaks ZMI for External Method

[David Chandek-Stark]

I have e-mailed the developer about this, but have gotten no response. 
After adding an external method in the ZMI, I get errors when attempting 
to revisit the method. This makes it impossible to run external methods 
via the 'Test' tab.

Zope 2.6.2/Python 2.1.3
Zope 2.7.0/Python 2.3.2

Traceback (innermost last):
   Module ZPublisher.Publish, line 98, in publish
   Module ZPublisher.mapply, line 88, in mapply
   Module ZPublisher.Publish, line 39, in call_object
   Module Shared.DC.Scripts.Bindings, line 252, in __call__
   Module Shared.DC.Scripts.Bindings, line 283, in _bindAndExec
   Module App.special_dtml, line 174, in _exec
   Module Shared.DC.Scripts.Bindings, line 266, in __render_with_namespace__
   Module Shared.DC.Scripts.Bindings, line 283, in _bindAndExec
   Module App.special_dtml, line 174, in _exec
   Module DocumentTemplate.DT_With, line 76, in render
   Module DocumentTemplate.DT_Util, line 201, in eval
    - __traceback_info__: this
   Module <string>, line 0, in ?
NameError: name 'externalEditLink_' is not defined