Input background resets

Created by: vadimk

In v2.0.3 you've added input background reset (that was not listed in changelog btw), specifically in ticket #3036 (closed) https://github.com/twitter/bootstrap/issues/3036

Related commits: https://github.com/twitter/bootstrap/commit/a7d8145a321036e39a91fc9648710e62f7f164ac#less/forms.less https://github.com/twitter/bootstrap/commit/99a916d5ebfdf5199be0232ac8bf6d569f54f07c#less/forms.less

The problem is that now in iOS for example all the radio and checkbox inputs look awful.

IMO, "or you are simply assuming that the user has their color scheme configured a certain way." (from that issue) is correct behavior, it should not override default user agent behavior unless you have styles for that.