Login: Basic user dropdown implementation.
Remove redundant navigation template.
Update user navigation markup on map page.
set pointer-event properties to make the site logo clickable.

- the user-nav div stretches over the main logo, making it non-clickable. disabling pointer events on user-nav makes the underlying logo clickable again. then, explicitly re-enable pointer-events for the descendants of user-nav div (i.e. the actual user nav buttons).