OR-14383: Fixed timing bug in SC.Store callback mechanism.
OR-14383: Fixed timing bug in SC.Store callback mechanism.

The callback function has to be remove from the queue before being invoked
in case there's another callback added to the queue with the same store key
during the invocation of the first callback (maybe as a result of a binding
or observer, if not explicitly).

Eloqua/sproutcore,Eloqua/sproutcore,Eloqua/sproutcore