Slug override ignored for /home

My frontpage folder is at `/01.home/`, and had a custom slug. However, grav admin still used /home/ for at least finding subpages. Any 'formfield pages' dropdown failed to locate the correct page and used /home/ as a fallback. Actually renaming the folder to what the slug used to be seems to have solved the problem.

I noticed this when upgrading the admin panel from v1.2.14 to v1.4.2 (grav 1.1.17 to 1.2.4)