Tweak pullToRefresh to be more realistic

Have the pullToRefresh action pull from 25% of the way down the element to 75% of the way down, instead of pulling from the center and pulling a full height of the element

Author: Justin Martin

Sources/KIF/Classes/KIFUITestActor.m

@@ -1335,7 +1335,8 @@ - (void)pullToRefreshAccessibilityElement:(UIAccessibilityElement *)element inVi
     // Can handle only the touchable space.
     CGRect elementFrame = [viewToSwipe convertRect:viewToSwipe.bounds toView:[UIApplication sharedApplication].keyWindow.rootViewController.view];
     CGPoint swipeStart = CGPointCenteredInRect(elementFrame);
-    CGPoint swipeDisplacement = CGPointMake(CGRectGetMidX(elementFrame), CGRectGetMaxY(elementFrame));
+    swipeStart.y = swipeStart.y - CGRectGetMaxY(elementFrame) / 4.0;
+    CGPoint swipeDisplacement = CGPointMake(0, CGRectGetMaxY(elementFrame) / 2.0);
 
     [viewToSwipe dragFromPoint:swipeStart displacement:swipeDisplacement steps:kNumberOfPointsInSwipePath];
 }