innerDrawerCallback startup time

[noobloser]

If I analyzed that correct, the callback waits for the animation to finish.
Giving the Use Case that a Trigger Button's Color should change onToggle, this creates an ugly visible delay :/
I could imaging 3 ways to fix this issue:

1. an additional callback, which fires on before the animation finishes
2. move the innerDrawerCallback before the animation (might create issues for other existing use cases I am not aware of)
3. open the value of InnerDrawerState, so one can listen to the actual value change and react

(sry, if I am to overreaching)