False positive on and/or

[markjaquith]

As part of its output, git status prints this:

use "git add" and/or "git commit -a"

PathPicker picks up and/or as a path. I don't know if excluding and/or specifically is a good idea, but given the popularity of git, I think that use "git add" and/or "git commit -a" could be specifically excluded.

[eduardtm]

I ran into the same issue during my first minutes of using fpp, +1

[pcottle]

Yeah false positives don't really hurt you, but they are less than ideal. lets merge this into #83 which tracks the filesystem validation side