Bug: Scrollable footer

[JT-39]

Describe the bug

The footer is scrollable on certain pages. There is a large grey area and the bottom of the page which you can scroll.

To Reproduce

Steps to reproduce the behaviour:

1. Go to 'All LA Level'
2. Scroll to the bottom of the page
3. Click on 'Support'
4. See error (can be intermittent)

Expected behaviour

The footer should appear and can be large if little content on the page or a big screen, but it should not be scrollable.

Screenshots

Video.Project.4.mp4

Desktop (please complete the following information):

• OS: Windows
• Browser Edge
• Version 131.0.2903.99 (Official build) (64-bit)

Additional context

Think adding the CSS flex-grow: 0 in the govuk-footer class should stop this from being scrollable, but might be better to figure out if the navigation links JS is causing this issue and fixing the issue there (I think because its scrollable).