silverstripe/sapphire — comment on commit 46628721fe72d4473133ae3dd37b536aa53aea16
File: admin/javascript/LeftAndMain.js line 366
By chillu:

Nah it won't break, because "normal" checkboxsetfields don't contain a `` element.
It'll just have the class "has-chzn" wrongly applied, but that doesn't have any styling or behaviour effect.
I'll use the custom class in the template as you suggested, cleaner solution.