Keep labels in production build

[richardgorman]

Hi, I was wondering if it is possible to keep the label in the class name for a production build. This would be very helpful. My use case is that I use the class names for identifying elements for automated testing and I want to test my production stack.

If this feature is not yet available (i think it isn't) would a PR be considered for this missing feature? Maybe an overwrite option would be the best way.