Core - CefRunContextMenuCallbackWrapper use cef_event_flags_t as typedef was removed

- Change to use cef_event_flags_t
- Fix some xml doc

chromiumembedded/cef@d9b7648

Author: amaitland

CefSharp.Core.Runtime/Internals/CefRunContextMenuCallbackWrapper.h

@@ -50,7 +50,7 @@ namespace CefSharp
             {
                 ThrowIfDisposed();
 
-                _callback->Continue((int)commandId, (CefRunContextMenuCallback::EventFlags) eventFlags);
+                _callback->Continue((int)commandId, (cef_event_flags_t) eventFlags);
 
                 delete this;
             }

CefSharp/Handler/ContextMenuHandler.cs

@@ -65,7 +65,7 @@ void IContextMenuHandler.OnContextMenuDismissed(IWebBrowser chromiumWebBrowser,
 
         /// <summary>
         /// Called when the context menu is dismissed irregardless of whether the menu
-        /// was empty or a command was selected.
+        /// was canceled or a command was selected.
         /// </summary>
         /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control</param>
         /// <param name="browser">the browser object</param>

CefSharp/Handler/IContextMenuHandler.cs

@@ -39,7 +39,7 @@ bool OnContextMenuCommand(IWebBrowser chromiumWebBrowser, IBrowser browser, IFra
 
         /// <summary>
         /// Called when the context menu is dismissed irregardless of whether the menu
-        /// was empty or a command was selected.
+        /// was canceled or a command was selected.
         /// </summary>
         /// <param name="chromiumWebBrowser">the ChromiumWebBrowser control</param>
         /// <param name="browser">the browser object</param>