search bar UI: (1) add magnifying glass icon to top search bar; (2) unify CSS styling for home and top search bar; (3) fix visual glitches with input shadow, focus ring, etc.
search bar UI: (1) add magnifying glass icon to top search bar; (2) unify CSS styling for home and top search bar; (3) fix visual glitches with input shadow, focus ring, etc.

sourcegraph/srclib-ruby,sourcegraph/srclib-ruby,sourcegraph/srclib-ruby,sourcegraph/srclib-ruby,sourcegraph/srclib-ruby,sourcegraph/srclib-ruby