Toolbox related issues

[gbraad]

Fedora image:

• Add passwd

  Error: failed to remove password for user gbraad: passwd(1) not found

• Make sure NAME is used

[gbraad]

Icon is due to the following https://github.com/89luca89/distrobox/blob/f008b521ee776a66c36a87848c85d3e3f0f6a3dd/distrobox-generate-entry#LL230C19-L230C19

it tries to get the icon from raw.gh