Syncs upstream updates

Major PRs associated with this sync are
https://github.com/codeforamerica/ohana-web-search/pull/576 and
https://github.com/codeforamerica/ohana-web-search/pull/561.
Merge remote-tracking branch 'upstream/master' into upstream-updates
Remove alert link underline

There is a double-underline when links appear in the alert. This
removes the default underline.