Quoting S Page:
What's the quickest way to go from seeing a bug for a particular component
to viewing all bugs for that component? That's my biggest frustration with
Bugzilla. The advanced search is so big and complicated, and having to
re-choose Mediawiki extensions & choose extension each time gets old.
RedHat Bugzilla shows a "(Show other bugs)" link next to the component dropdown. Simon (its maintainer) was kind enough to point me to https://bugzilla.redhat.com/show_bug.cgi?id=458436 which has that four-liner patch attached.
Has not been upstreamed unfortunately.