“Stage all” doesn’t respect `status.showUntrackedFiles no`

**Describe the bug**
I’m using a bare repo to manage my dotfiles. I use `config status.showUntrackedFiles no` to keep `git status` usable. LazyGit respects that much, and doesn’t show untracked files in the Files pane. However, when I pressed `a` to stage my changes, LazyGit staged **every single file under my home directory**. This made it hang repeatedly, and was quite a headache to fix ^^.

I’m using FreeBSD 12.