Panning-only player interface on mobile

Going from no mobile support to just a little mobile support with this change. Now when you visit a Shmeppy game on your phone you’ll be able to pan around the map.

Hopefully I’ll be able to attract some mobile users to the testing site :sweat_smile:, there’s gonna be a lot of changes involved in this “mobile support for players” feature I wanna get out to ya’ll.