Reset weapon state to equipped during mid-equip/unequip knockdown (#9258)

Closes #9258 (closed)

Try this @AbduSharif. In any case, I believe this to be an improvement.

The None reset added and totally undocumented in 8455ed62 is incomplete and doesn't properly let the equip animation restart as it seemed to intend to do. That aside, the transitions appear to be backwards (i.e., equip animations should generally not restart if they managed to start before KO while unequip animations should), so they should be handled as a part of the common case. Difficult to time this correctly during testing, though. Morrowind has this mysterious behavior where it plays the attack animation during mid-equip stagger which probably shouldn't be copied.

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