Rotate Children option for the bone part?

[SirSputnik]

So I was thinking that it might be a good idea to add a "Rotate Children" option to the bone part in PAC.
Essentially it will rotate any children that the bone part is applied to. i.e Rotating the upper arm also rotates the forearm and so on.

Also there could be an option for the Rotate children part that will be a number for how many children you want the bone to rotate with it. (Choosing 1 might be just the forearm that will rotate with the upper arm, leaving the hand and its fingers untouched.)

Adding this part would make workflow easier for people when they are posing with bones in PAC as well as using proxies for complicated events that involve a lot of movement.