[NUI] Fix vertical scrollbar position bug (#2639)

There was a copy & paste error in vertical scroll position calculator in a scrollbar.

Signed-off-by: Jiyun Yang <ji.yang@samsung.com>

diff --git a/src/Tizen.NUI.Components/Controls/Scrollbar.cs b/src/Tizen.NUI.Components/Controls/Scrollbar.cs
index fa420f7..abc1a20 100755 (executable)
--- a/src/Tizen.NUI.Components/Controls/Scrollbar.cs
+++ b/src/Tizen.NUI.Components/Controls/Scrollbar.cs
@@ -706,7 +706,7 @@ namespace Tizen.NUI.Components
             public override Vector2 CalculateThumbScrollPosition(Size trackSize, Vector2 thumbPosition, PaddingType trackPadding)
             {
                 float pos = Math.Min(Math.Max(currentPosition, 0.0f), contentLength - visibleLength);
-                return new Vector2(thumbPosition.X, trackPadding.Item1 + trackSize.Height * pos / contentLength);
+                return new Vector2(thumbPosition.X, trackPadding.Item3 + trackSize.Height * pos / contentLength);
             }
         }