Default hide geolcation

- 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.
- Removes unneeded ERB.
- Fixes #503 - Moves geolocation button on inside location filter input
field above the input field. This makes it so when the geolocation button is hidden
initially the layout doesn’t change when the geolocation button shows up.

@monfresh Ready for review and merge. Aligns code here with that in https://github.com/smcgov/SMC-Connect/pull/49