This involves making PhysicsActor.PIDActive get as well as set.
On physics components that don't implement this (all characters and some phys engines) we return false.
These stopped working because current code calculates sit heights based on avatar physics rather than appearance data.
Also changed BasicPhysics to not divide Z param of all set sizes by 2 - there's no obvious good reason for this and basicphysics is only used in tests
Fixes: Undo, T-pose of others on login, modifiedBulletX works again, feet now stand on the ground instead of in the ground, adds checks to CombatModule. Adds: Redo, Land Undo, checks to agentUpdate (so one can not fall off of a region), more vehicle parts. Finishes almost all of LSL (1 function left, 2 events).
Direct flames and kudos to Revolution, please
Signed-off-by: Melanie <melanie@t-data.com>
