Extend new container type to headers & footers

[nicolepaschen]

The new container type will also be needed for headers (custom from Customizer and custom header template), sticky headers, and footers.

[nicolepaschen]

Beta 1 - something in the full width header and footers are causing a horizontal scrollbar on all screensizes. Happens on Callaway and Coherent Inspirations. Monument too and the menu isn't vertical it's horizontal