Support <label> tag

[cthiebault]

GwtChosen does not support label tag.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/label

It would be nice if when we click on label element, it opens the item list...

[meriouma]

Not sure this can be done, since Chosen hides the native select to replace it with a div, and the label isn't supposed to contain a div

[jDramaix]

we could support that. The only thing we have to do is to find the label element either by checking if the select is not included in a label or by querying the dom to search a label element with attribute for equals to the id of the select element ($("label[for='mySelectId']")

Once the label is found, just add a click handler on it that will put the focus on the chosen element.