[Request] Make stacked sheared sheep not regrow wool for the entire stack

[spathizilla]

When you shear sheep, they can split off from the main stack and be able to restack as a sheared sheep stack. However, if this sheared stack then eats grass, the entire stack will regrow wool bypassing the need for the rest of them to eat the grass.

I know this could be avoided by multiply settings but I kinda wanted the split stacks for other reasons. It would be possible to use SheepRegrowWoolEvent to split from the sheared stack and then allow it to remerge with the main unsheared stack through the normal merge methods.