Expose ScrollSpeedWheel and ScrollSpeedClick for scroll bar editing

#946

Source/Engine/UI/GUI/Panels/ScrollBar.cs

@@ -146,6 +146,24 @@ namespace FlaxEngine.GUI
             }
         }
 
+        /// <summary>
+        /// Gets or sets the speed for the scroll on mouse wheel.
+        /// </summary>
+        public float ScrollSpeedWheel
+        {
+            get => _scrollChange;
+            set => _scrollChange = value;
+        }
+
+        /// <summary>
+        /// Gets or sets the speed for the scroll on mouse click.
+        /// </summary>
+        public float ScrollSpeedClick
+        {
+            get => _clickChange;
+            set => _clickChange = value;
+        }
+
         /// <summary>
         /// Gets the value slow down.
         /// </summary>