Add a CSS component for search fields.
Review Request #10741 — Created Oct. 3, 2019 and submitted
This gives us a search field we can use in multiple locations. We've
previously been re-crafting search fields over and over, which doesn't
make much sense.
The field is basic. It consists of an outer container, an icon, and a
text input field.
As of this change, nothing currently uses this component, but an
upcoming change will move the New Review Request page over to it.
Used this in the upcoming New Review Request page rewrite.