Turns movable chairs on click
Fixes non-existant feet getting bloodied and adds blood to wheelchairs
Fixes teleporting while buckled
Stops buckled mobs from slipping (for now)
Fixes in wheelchair and different handling of movement
Minor code cleanup
Fixes wrong person getting movement penalty
Gives test-firing an actual use
Merge pull request #5476 from Hubblenaut/wheelchair

Wheelchair Fixes