Move Filter access from map button to Menu screen

Added an experiment in using arrows drawn with polyline to indicate tee-box and basket for the disc golf hole paths.  The code should be factored before being actually used, and it leaves the user with no way to identify the hole numbers, so I'll have to make the polylines respond to taps before it could be deployed, but it makes the disc golf section of the map way less crowded looking, so it might be worth it.