Hiding US-Mexico Positions
To hide a position, click on the position title in the accordion element and add "hide" in the Custom Class section (pictured below.) The position will stay visible in the UX Editor until the page is refreshed.
To reactivate the position listing, navigate to the element in the sidebar (it helps to click on one of the other accordion elements first), and double-click it to open the settings and delete the "hide" class.