Add URL parameter to turn off "Don't use while driving"

[barbeau]

Summary:

We're looking at using the USF Maps App on TVs in display lobbies. As part of these installations, we shouldn't show the "Don't use while driving" prompt. We should add an option to suppress this warning if a URL parameter is included.

[barbeau]

From @liquidsunshine, regarding priority of some of these related issues for using the app to show information in the CUTR lobby on a TV display:

Here’s how I would prioritize them, based on CUTR’s needs:

1. Route polylines don't show when visiting direct link to route layers #401 (a bug)
2. Make map zoom and center configurable via URL parameters #403 (allows us to automatically center on CUTR)
3. Add URL parameter to turn off "Don't use while driving" #404 (allows us to automatically bypass popup)
4. See if we can support an additional map zoom level #405 (offers a better view of CUTR)
5. Make client-side refresh rate configurable via URL parameter #402 (possibly improves refresh performance)