Refactor check box and radio button helpers

[lcreid]

One approach to solving #477 and related issues would be to implement be to make our implementation use the Rails methods for label and check_box and radio_button in a way that would make our helpers easier to use in the collection helpers.

[lcreid]

It looks like the Rails internals use string keys, and we use symbol keys. This could be causing all sorts of unexpected behaviour, and could require all sorts of extra code.

[lcreid]

Added the Bootstrap 5 label because we should take a look at this if we're making changes to the fundamental code.