Contract checkbox

Should we start moving to explicit parameter passing to views?

```ruby
community_customizations ||= find_or_initialize_customizations(@current_community.locales)
show_transaction_agreement = @current_community.transaction_types.any? do |transaction_type|

render 'edit_details', locals: {community_customisations: community_customisations, show_transaction_agreement: show_transaction_agreement}
```