ATReferenceBrowserWidget: allow empty search text

In my application I want users to select among all objects of a specific 
type (and then allow to search), but since the reference browser filters 
out an empty search text it shows nothing in the initial popup.
I've patched the popup to allow an empty query if allow_browse is false. 
I don't know it it's the best condition, but I suppose that if 
allow_browse is true something is displayed anyway in an initial directory.
The patch is at http://dev.plone.org/plone/ticket/5181

Bye
-- 
Luca Olivetti
Wetron Automatización S.A. http://www.wetron.es/
Tel. +34 93 5883004      Fax +34 93 5883007


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