Removes precompiled assets during browser testing

Removes precompiled assets during browser testing so polyfills can be
more easily tested.
Adds IE8 toggle :checked selector polyfill
Hide geolocation button by default

Geolocation button was showing up when geolocation was not supported
(IE8). This hides the button by default and displays it only when
geolocation is supported.
Moves geolocation button above input field

Moves geolocation button on inside location filter input field above
the input field. Fixes issue noted in
https://github.com/codeforamerica/ohana-web-search/issues/503.
This makes it so when the geolocation button is hidden initially the
layout doesn’t change when the geolocation button shows up.
Updates precompiled assets