Enable user to reorder secondary languages

**Is your feature request related to a problem? Please describe.**

If a user selects more than one secondary language, the order they are displayed on the page is determined by the order of the languages in the DOM.

**Describe the solution you'd like**

Allow the user to choose the order of the secondary languages. They may prefer to have one language directly next to their primary language. Since the columns are `display: grid`, have JavaScript add a class that adds the CSS `order` property.