1c19fe8d81 isn't sufficient for local files, because detection is run
twice, so a translator may not be available when the detect callback is
run. This changes the test to poll for the translate icon, which is a
bit of a hack but does the job.
Unfortunately this isn't perfect either, because it seems the RIS
detection sometimes just isn't run, which means that the icon never
changes and the test times out. Maybe @simonster has an idea why that's
happening.
Otherwise the test could run scrapeThisPage() before translators were ready. It
would be good to make scrapeThisPage wait for detection to complete so that an
early press still uses a translator for saving, but this way tests can also
test for the proper icon (though they don't now).
This changes Zotero.Translate.Base.translate() to take an options object (in
order to take a 'collections' parameter, which is passed to the
Zotero.Translate.ItemSaver constructor). The old parameters are still supported
with a deprecation warning, and there may be other places that still need to be
updated.
