xml template clean up
error handling for bbox selection size when requesting export forms
update the max selection size error message
modify the base layers and zoom level for the app

We are using the new base map from mapbox. This layer is load balaced
across four servers. Because of this update to the base map layer we
increased the max zoom level from 8 to a wopping 16.
Remove the draw tool constraint from the app

Now that there is a server side limitation to the exposure download
the draw tool constraint is no longer needed.
Handle selection size 403 errors when requesting export forms