Logo not appearing on the menu on the left when seeing the help page

[agbeltran]

Description:
When loading the Help page, the logo on the left-hand side menu area is not shown.

Acceptance criteria:

• show logo on the left-hand size when in the help pages

[sam-glendenning]

This occurs on all pages where the page is too big for the screen - the logo is there, you just need to scroll to the bottom to see it. Question is: do we want to change this so that the logo is always fixed at the bottom left of the screen? What this could lead to is the addition of a vertical scroll bar in the navigation drawer in cases where the number of routes is greater than what can appear on screen