This patch fixes two problems in the template "classic":

1. In some places in the code, the keyword field is
called "topic" instead of "keyword", and this shows in
the interface (like in the dropdown for grouping search
results).

2. When creating a new issue, if you click on the
(list) link by the keywords field, a miniwindow pops
up.  If there are no keywords, then the apply and
cancel buttons don't close the window, because there's
a javascript error.

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Kurt, I've checked in the javascript part of your patch.
You'll have to convince Richard if you want to have the
first part checked in.

Oh, and some general comments on your patch: please use
context diffs (-c), and split up your patch per-feature. It
makes it easier for us to apply it.

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I'm grateful for the JS patch, but I don't believe it's necessary 
to change the topic/keyword stuff.