Fix dismissing viewController with dismiss(animated:completion:) method #64
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I use your gallery in my app, it's very nice, but if found issue:
When you try to dismiss photoViewer calling dismiss(animated:completion:) from another class, app freezes. It's because transitionController has flag "forceNonInteractiveDismissal" set to false and "interactionControllerForDismissal" return dismissal animator, while it should return nil to perform non interactive dismissal correctly.
I renamed flag "forceNonInteractiveDismissal" to "forceInteractiveDismissal" and changed logic, so interaction dismissal begins with gesture recognizer, and default dismissal is now non interactive.