[Suggestion] Better automated bone names when duplicating and flipping

[thePixelmancer]

Make the automatic numbering of duplicate bones reset when the bones are flipped and have "right" or "left" in the name.

example:

duplicating nested bones like leftarm0>leftarm1 results in leftarm2>leftarm3 flipping the arm will then result in in rightarm2>rightarm3

it would be much nicer if they were then renamed to rightarm0>rightarm1