Clean protectedCss in config file

src/editor/config/config.js

@@ -40,7 +40,7 @@ define(function () {
     width: '100%',
 
     // CSS that could only be seen (for instance, inside the code viewer)
-    protectedCss: '*{box-sizing: border-box;}body{margin:0;height:auto;background-color:#fff}#wrapper{min-height:100%; overflow:auto}',
+    protectedCss: '',
 
     // CSS for the iframe which containing the canvas, useful if you need to custom something inside
     // (eg. the style of the selected component)