Fantasy Mounts 2.1.2

A hotfix: getting on a mount you may drive puts you in the driver's seat, wherever you click it.

Changes

• The driver's seat comes first. Before, a click behind a mount's middle sat you in the back, so getting on your own mount often meant changing seats before you could ride off. Now a player who may drive always takes the driver's seat when it is free. Anyone else (a guest on a server where only owners drive, a pet, a villager), and anyone once someone is driving, still takes the free seat nearest the click, and the Change seat key still moves riders afterwards.
• 2.1.1 and 2.1.2 can share a server; the fix works where the server (or your single-player world) runs 2.1.2.

Thanks

Thank you to every Trailblazer playtesting in early access.