The IntegerType supports floats, but as the name suggests it should only accept integers, i.e. whole numbers.

The NumberType supports floats, locale specific numeric strings (e.g. "40,000") etc.

I propose a change to these 2 types:

• IntegerType: should be used for whole integers as the name suggests
• NumberType: should be used for floats (rendering as an input[type="number"]), and have a new option (support_locale_strings or something similar) so that it renders as input[type="text"] and has the relevant attached NumberToLocalizedStringTransformer.

This is obviously a BC break so marked it for 3.0.