Propagate custom trans duration to untrans.
Propagate custom trans duration to untrans.

Duration is tracked and propagated to the untrans dir as well. So if you slide
in fast from the left, when you pop, you slide out fast too.

joansmith/tripleplay,tomfisher/tripleplay,tomfisher/tripleplay,joansmith/tripleplay,tomfisher/tripleplay,joansmith/tripleplay,joansmith/tripleplay,joansmith/tripleplay,tomfisher/tripleplay,tomfisher/tripleplay