Core - Improve IBrowserHost.NotifyMoveOrResizeStarted xml doc

Author: amaitland

CefSharp/IBrowserHost.cs

@@ -209,6 +209,7 @@ public interface IBrowserHost : IDisposable
 
         /// <summary>
         /// Notify the browser that the window hosting it is about to be moved or resized.
+        /// This will dismiss any existing popups (dropdowns).
         /// </summary>
         void NotifyMoveOrResizeStarted();