用svg的碼農們肯定知道，在path、rect等元數據中會加入一些自定義屬性，保存於數據庫，但是用svg-edit編輯器時，
讀取的時候，無法讀取些這些自定義屬性。解決辦法：找sanitize.js文件，在該數組中svgWhiteList找到相關元素，在后
面添加你自己的自定義屬性就好了。
"a": ["class", "clip-path", "clip-rule", "fill", "fill-opacity", "fill-rule", "filter", "id", "mask", "opacity", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform", "xlink:href", "xlink:title","自定義屬性"],