增加HeatmapChart热力图

Scripts/UI/Component/DataZoom.cs

@@ -197,11 +197,6 @@ namespace XCharts
         /// </summary>
         public FontStyle fontStyle { get { return m_FontStyle; } set { m_FontStyle = value; } }
 
-        /// <summary>
-        /// DataZoom is in draging.
-        /// 正在拖拽组件。
-        /// </summary>
-        public bool isDraging { get; set; }
         /// <summary>
         /// The start label.
         /// 组件的开始信息文本。