Add support for searching for URLs

[designatednerd]

I'd love to be able to search for things of the format https://company.atlassian.net/browse/PRJ-123 so I can easily find things I've linked with my bug tracker.

However, I tried adding https://company.atlassian.net/browse/PRJ- as my prefix, and it doesn't work unless I get all the way down to https, which also gets a bunch of other URLs I have in the code.

I'm guessing it's probably an issue with how the characters are separated, but I haven't had time to dive into the code. Any chance you might be able to add this?