[NUI] Implement the old API of Popup.SetButtonText for Manual.Tests failed (#1264)

diff --git a/src/Tizen.NUI.Components/Controls/Popup.cs b/src/Tizen.NUI.Components/Controls/Popup.cs
index 51f84fb..781b6c0 100755 (executable)
--- a/src/Tizen.NUI.Components/Controls/Popup.cs
+++ b/src/Tizen.NUI.Components/Controls/Popup.cs
@@ -660,7 +660,9 @@ namespace Tizen.NUI.Components
         /// <param name="text">Button text string.</param>
         /// <since_tizen> 6 </since_tizen>
         public void SetButtonText(int index, string text)
-        {}
+        {
+            AddButton(text);
+        }
 
         /// <summary>
         /// Dispose Popup and all children on it.