* All the various index-related issues should finally be sorted now.
It seems you cannot just partially implement some of these active
index getter/setters...
* Standardised the call used by PoseLib operators to get the Object
from which they get the active PoseLib data from
* PoseLib operators which require some existing data to work now use a
poll() which checks for this
* Added back the operator used to make standard actions into ones
usable by PoseLib
* Added a dummy operator for the apply active pose button which really
just calls the same backend functions as "Browse Interactive", but
which has a nicer frontend (naming + description) for the purpose of
being used in this way
* Also, removed some useless code from here
437bdbc96c