菜单名称变化

关键字：IContextMenuHandler、OnBeforeContextMenu、OnContextMenuCommand

 内容比之前老版本多了，样式好看了。

CefSharpSettings.RuntimeStyle = CefRuntimeStyle.Chrome;//127+以后将默认

//CefSettings.ChromeRuntime = false;//可禁用

namespace CefSharp.Handler
{/// <summary>/// Inherit from this class to handle context menu events. /// </summary>public class ContextMenuHandler : IContextMenuHandler{/// <inheritdoc/>void IContextMenuHandler.OnBeforeContextMenu(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IContextMenuParams parameters,IMenuModel model){OnBeforeContextMenu(chromiumWebBrowser, browser, frame, parameters, model);}/// <summary>/// Called before a context menu is displayed. The model can be cleared to show no context menu or/// modifie