Back navigation on mobile shouldn't close site when on menu

[LukePrior]

We shouldn't close the site when user navigates back on mobile if menu is open.

Instead just close the menu, existing behaviour can be maintained for when the menu isn't open.

Se potential approach: https://stackoverflow.com/questions/25806608/how-to-detect-browser-back-button-event-cross-browser

https://github.com/projecthorus/sondehub-tracker/assets/22492406/de3c1103-f446-4ed4-893a-89466fac0418

[TheSkorm]

https://github.com/user-attachments/assets/bf0e593b-04dc-45a6-aba0-b0b93c92d4fb

There's a couple of edge/ui quirks with this, but I'm going to go with "its good enough"