Revert form error messaging to red text without block background.
Merge branch 'master' into error-message-amends

* master:
  Simplify markup for radio buttons and checkboxes
embolden error message text and clear extraneous comments from global errors
Update radio button styles to match latest Origami designs
Use tick icon for check-boxes
Move fieldset/form sections to it own partial and adjust margin, padding and borders as requested by design
Change section border colour ref to palette rather than user case ref
Merge pull request #27 from Financial-Times/error-message-amends

Error message amends
Merge pull request #28 from Financial-Times/revise-fieldset-spacing

Update form sections
Add comments and fix placeholder names
Merge pull request #31 from Financial-Times/update-radio-checkbox-styles

Update radio checkbox styles
Merge branch 'master' of https://github.com/Financial-Times/o-ft-forms into update-select-trigger-style

Conflicts:
	src/scss/_variables.scss
Remove arrow backdrop

This allows us to simply markup and styles