Beam attack and claw flurries stay on their feet

The beam attack was rebuilt: the creature steps into a braced stance, charges, is pushed back by the beam's recoil and steps home. It no longer sinks through the floor on short-legged creatures.

Claw attacks that reach far now advance step by step between the strikes instead of dragging the feet, and paws no longer swing into the creature's own body.

Errors in the editor now appear as a notice you dismiss, instead of a line of red text that is easy to miss.