Center the search button at bottom of map view

[mikewilburn]

The Search button is currently centered at the bottom of the entire application window.
It would demonstrate a better practice to show how to center it at the bottom of just the map view.

It appears a bit oddly when it becomes offset:

[mikewilburn]

This would make it consistent with how Google Maps behaves when we pan or otherwise move the initial searched map extent.

[odoe]

This will require I build a custom snackbar component rather than use the one that comes with @rmwc that I use. I can do this at a later date.

[mikewilburn]

Good to know @odoe. I don't think it's imperative that it's done right away anyway.

[mikewilburn]

It would also be nice for the snackbar (when/if implemented) to not auto-dismiss from view if the the user doesn't interact with it immediately.
Google's "SEARCH THIS AREA" button remains visible until clicked.