Don't add names that haven't been looked up yet to the group roles list, wait for them to be looked up, then check them against the filter.. this avoids unrelated names getting turned up in the list under a filter.
Also diverged a bit from upstream to filter using the displayed names, since people who are only having Display Name shown will get inconsistent names turned up by the filter, otherwise. (Searching "Inusaito Kanya" would turn up "Aur'a Færs" in the results, which obviously isn't what they're looking for... maybe this should be done with complete name, but logically you should see what you searched in your results)
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