Make default strategy idle animations a bit more random

[robojumper]

When playing lots of strategy idle animations for many units at the same time, it can be quite noticeable when units are playing the same animation.

A change somewhere around here can help to alleviate that problem for Unit Pawns:

X2WOTCCommunityHighlander/X2WOTCCommunityHighlander/Src/XComGame/Classes/XComHumanPawn.uc

Lines 2497 to 2503 in 50d24a1

	if(AnimTreeController.CanPlayAnimation(PlayAnimParams.AnimName))
	{
	PlayAnimParams.BlendTime = 0.5f;
	PlayAnimParams.Looping = true;
	PlayAnimParams.PlayRate = class'XComIdleAnimationStateMachine'.static.GetNextIdleRate();
	AnimTreeController.PlayFullBodyDynamicAnim(PlayAnimParams);
	}

X2WOTCCommunityHighlander/X2WOTCCommunityHighlander/Src/XComGame/Classes/XComUnitPawn.uc

Lines 3309 to 3315 in 50d24a1

	if(AnimTreeController.CanPlayAnimation(PlayAnimParams.AnimName))
	{
	PlayAnimParams.BlendTime = BlendTime;
	PlayAnimParams.Looping = bLooping;
	PlayAnimParams.PlayRate = class'XComIdleAnimationStateMachine'.static.GetNextIdleRate();
	Sequence = AnimTreeController.PlayFullBodyDynamicAnim(PlayAnimParams);
	}

Changes in XComAlienPawn for Gremlins etc. would be nice to have too.

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Code pointer: SkeletalMeshComponent (via self.Mesh) has a function FindAnimSequence(Name AnimSeqName) that returns an AnimSequence with a property SequenceLength. Randomize between [0, SequenceLength] and set PlayAnimParams.StartOffsetTime.

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Potential pitfall: We may end up skipping crucial Notifies. Restrict the random roll to [0, FirstNotifyTime]?

[Xymanek]

Context: in WOTCStrategyOverhaul/CovertInfiltration we use Squad Select screen for covert ops loadout (which includes engineers and scientists). While they properly use the same anim as the after action reward screen it is visible that they do it extremely same (same thing happened in LW2 after action on "rescue resistance personnel" where you had multiple rewards).

I'll probably implement this (a bit later though as it's not very critical)