Multiple Choice Widget has broken semantics

[hamishtaplin]

Expected behaviour

• all label tags should be associated with a single input

Actual behaviour

• multiple choice (label/radios) widget potentially contain a label that has no associative input.

Steps to reproduce the behaviour

• start UKIS (1_0001.json)
• navigate to question "1. General Business Information"
• repeating radio fields use a label (eg 'Apple was established') where a fieldset is the correct semantic choice

Screenshot

[hamishtaplin]

Fixed here #872