Allow html5 attributes

[gregh3269]

See WW-4607

[lukaszlenart]

Maybe it would be better to use a safe way, ie. String.valueOf(type)?

[gregh3269]

I did use originally .valueOf and then checking the other handlers they all used the cast, so matched what they use, for code style.

[lukaszlenart]

Maybe you could refactor the rest as well and use String.valueOf or leave it as is, up to you :)

[gregh3269]

Object type = params.get("type");
attr.add("type", type == null ? "text" : type.toString())

valueOf checks for nulls and calls .toString can skip the check?

[lukaszlenart]

You must check for null because String.valueOf(null) will return a String "null" :\ I think the current solution is ok :)