Do you already
know Special:Allmessages?
Does Special:Allmessages provide the search capability about which I asked,
and I just don't realize it? Cause I didn't see any way to do it from there.
Cheers,
-- jr 'IE: "yes" :-)' a
People usually set it to 5000 and use the 'search in this page' feature
of their browser. Which is far from convenient.
For a 2 years old bug requesting that needed feature, see