content chooser search has issues with extended chars

[hvelarde]

content chooser search does not behaves the same when using extended or standard chars; on the images attached you can see different search results when using "apagão" and "apagao":

results must be always the same; please use integration tests here.

[hvelarde]

according to @jpgimenez this is a known issue of the ZCTextIndex lexicon in versions of Plone below 4.3; the proposed solution is to install Products.UnicodeLexicon in that case:

The standard ZCTextIndex lexicon only deals with 8-bit strings (and only
if you get the zope.conf locale setting right). It does not handle Unicode
or UTF-8. UnicodeLexicon fills this gap.