Fix deprecated #scope without callable usages

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Fix deprecated Relation#all usages

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Fix deprecated dynamic finder usages

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Fix deprecated link_to :confirm option

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Enable i18n enforce_available_locales in config

Signed-off-by: Alex Coles <alex@alexbcoles.com>