Creatures use all swipe frames

[Loobinex]

Fixes #2708

[AdamPlenty]

The swipes are so fast, I can't even be sure there's a difference.

[Loobinex]

Returned to draft because it does not display the final frame now

[Loobinex]

It works now, but I think it's a risky change for such a small benefit.

The issue with the swipes was at the final turn of the instance, the 'set instance' was cleared and swipes are linked to instances. So when it was time to draw a swipe at turn 5 of 5 of the melee instance, the melee instance was no longer there and nothing was drawn. Now, I clear the instance at the start of turn 6, so after the swipe is drawn.

My fear is that extra turn of the instance being known will have unexpected side effects.