Better display of parts blocked by SpamBlacklist.

Currently if a rule says "go.gle" and http://www.google.com/ is being
added, "http://www.google" is displayed as the blocked part. This
doesn't look quite nice. Now it just displays "google".

Change-Id: I0851c00d38129a8e9910c65100998eb3f1e5b2c2
Merge "Better display of parts blocked by SpamBlacklist."