Aciviti-editor在ie11下保存流程模型报错解决（在chrome下保存没有关问题）

Aciviti-editor在ie11下保存流程模型报错解决（在chrome下保存没问题）
参考博客：
http://www.cnblogs.com/ksmile/p/4567009.html
关键代码：
文件editor-app/editor/toolbar-default-actions.js

  // Parse dom to string
        var svgDOM = DataManager.serialize(svgClone);
        
        //copy from internet #s2016-04-01
        svgDOM = svgDOM.replace(/marker-start="url\("#/g,"marker-start=\"url(#").replace(/start"\)"/g,"start\)\"");
        svgDOM = svgDOM.replace(/marker-mid="url\("#/g,"marker-mid=\"url(#").replace(/mid"\)"/g,"mid\)\"");
        svgDOM = svgDOM.replace(/marker-end="url\("#/g,"marker-end=\"url(#").replace(/end"\)"/g,"end\)\"");
        //copy from internet #e