TIMOB-19580 we have introduced activity*Transition properties for Ti.UI.Window.
We also still have activity*Animation properties for Ti.UI.Window.open() and Ti.UI.Window.close().
This is confusing, but also seems to not always work as expected:
If you try the Activity Transitions example in the Ti 5.2.0 Sample App and set all activity*Transition properties to TRANSITION_NONE you will see that if you use the system navigation bar (or hardware) back button in Window B it will indeed close without animation. But if you use the Action Bar Level Up icon (which simply calls Ti.UI.Window.close()) it will fade out.
1. Make sure that if I call Ti.UI.Window.close() without activityEnterAnimation and activityExitAnimation, it will honour Ti.UI.Window.activityReturnTransition.
2. Deprecate and in 6.0 remove the activity*Animation properties.