Fix specs to work with new `static` version

Recent change in `static` ([1](https://github.com/alphagov/static/pull/441),
 [2](https://github.com/alphagov/static/pull/445)) changed how
the `report-a-problem` mark-up and JS code work, which meant that some specs in
this app broke. This change fixes those specs.
Bump slimmer to v5.0.0

This picks up the automatic report-a-problem form, which means that the form
can be removed from this app (and the appropriate header set in places where
it's not desired).
Merge pull request #137 from alphagov/bump-slimmer-for-automatic-report-a-problem

Bump slimmer for automatic report-a-problem
Extract 'report-a-problem' hiding into ApplicationController
Merge pull request #138 from alphagov/refactor-report-a-problem-hiding

Extract 'report-a-problem' hiding into ApplicationController
Update feedback inline with the new style radio buttons and checkboxes

• update to latest toolkit version
• include required clas for styling

https://www.agileplannerapp.com/boards/105200/cards/5197
update js to fix broken remove 'disabled' function
Fix borken inline text input for location-specific