Button label selector omits quotes / fails for ids with ":"

The button label selector uses the id of the checkbox

without quoting it. Here is the relevent line of

UI Button code:

labelSelector = "label[for=" + this.element.attr("id") + "]";

If the id contains a colon or some other interesting character

labelSelector becomes, for example,

label[for=sample:123]

instead of

label[for="sample:123"]

Here is a jsfiddle demonstrating the problem:

http://jsfiddle.net/jgQaV/1/

I encountered the problem in 1.8.11 and reproduced it in 1.8.14.

The fix is trivial:

labelSelector = "label[for=\\"" + this.element.attr("id") + "\\"]";

I'm making this change in a github fork and will request a pull

in a few minutes.