Fix interactive gallery dismiss going wrong direction when gesture starts out very slow

Tusker/Screens/Large Image/Transitions/LargeImageInteractionController.swift

@@ -29,7 +29,8 @@ class LargeImageInteractionController: UIPercentDrivenInteractiveTransition {
         var progress = translation.y / 200
         if let direction = direction {
             progress *= direction
-        } else {
+        } else if abs(progress) > 0.01 {
+            // if the progress is less than +/- 1%, don't set the direction because the translation may be random jitter in the user's finger
             direction = progress > 0 ? 1 : -1
             progress = abs(progress)
         }