Enabling translations on site settings changes format of array passed to templates

Problem/Motivation

When Content Translation is enabled for Site Settings fields, an array of the site setting value and 'user_id' field gets passed to the template, rather than just the text.

Proposed resolution

Update loader to keep the format consistent.

Remaining tasks

Supply patch.

User interface changes

None.

API changes

None.

Data model changes

Make the site settings array consistent between translated and non-translated sites.

Release notes snippet

Site settings array is now consistent whether or not translation is enabled on them or not. If your site is already translated, you may need to update the uses in your templates.