Navigation hidden under "latest site" banner

[2ndkauboy]

On some old WordCamp site, the (main) navigation is hidden under the new "latest site/year" banner introduced with #725.

To reproduce

Here are two examples of probably many WordCamp sites with this issue:

• https://london.wordcamp.org/2013/
• https://europe.wordcamp.org/2016/

Expected behavior

When the banner is shown on a page, the rest of the page should move down, including any fixed navigation.

Screenshots

Screenshots of the two example pages with the banner set to opacity: 0.75 to visualize the navigation behind the banner:

WordCamp

See above (and probably more).

[2ndkauboy]

This issue was worked on a #WCDE Contributor Day.