add ButtonGroup

replaced RadioButton with ButtonGroup

src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs

@@ -177,6 +177,15 @@ namespace HandyControlDemo.Properties.Langs {
             }
         }
         
+        /// <summary>
+        ///   查找类似 按钮组 的本地化字符串。
+        /// </summary>
+        public static string ButtonGroup {
+            get {
+                return ResourceManager.GetString("ButtonGroup", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 日历 的本地化字符串。
         /// </summary>