Fix for userlist

[kragebein]

This works for me that doesnt have any local users (FreeIPA/Active Directory setup). Would also work for local users.

[nwg-piotr]

I don't think it's going to filter out the ftp user on Slackware. It does have their home dir. Am I wrong?

[nwg-piotr]

[kragebein]

Okay, i've created a check that checks /etc/login.defs to ensure we only get human like users (except root).
The ftp user had something like uid 14 and shouldnt pop up.

Any users with uid lower than 1000 should not make the cut.

But the application will still fail if the userlist still comes back empty (e.g, a user hasnt logged in for the first time yet), in that case it would crash back to terminal. So in any case the user list comes back empty, the drop down field should be replaced with a text field where the user can type in their username instead.

[nwg-piotr]

But the application will still fail if the userlist still comes back empty (...)

This should never happen, unless someone creates a new user w/o the -m argument. For sure not on nwg-iso, which the greeter was written for. Users created during installation have their home dirs and are visible on the 1st run.