Fixed so that removing an object that is not contained by a list does nothing (instead of throwing an exception)
Fixed so that removing an object that is not contained by a list does nothing (instead of throwing an exception)

CoNarrative/glujs,murrah/glujs,murrah/glujs,codekoala/glujs,codekoala/glujs,CoNarrative/glujs,murrah/glujs,murrah/glujs,codekoala/glujs,CoNarrative/glujs