Added some styling to the overlay svg. Fixes the clipping bug as far as the HTML specs is concerned, but there is a webkit bug which means it's still broken for Chrome and Safari.
Added some styling to the overlay svg. Fixes the clipping bug as far as
the HTML specs is concerned, but there is a webkit bug which means it's
still broken for Chrome and Safari.

cse-bristol/energy-efficiency-planner,cse-bristol/community-energy-fund-map,cse-bristol/energy-efficiency-planner,cse-bristol/community-energy-fund-map,cse-bristol/energy-efficiency-planner