Move import for gui elements

[Muehli25]

Simple Fix for #88

[paulypeter]

That still wouldn't work when choosing to generate the config, or does it?

[Muehli25]

I just moved the import. It's working fine in ubuntu desktop and ubuntu server. (atleast on my machine 😄 )

[sibalzer]

I accept this as a temporary hotfix. But it shouldn't be the final solution. (contradicts PEP8, and the cli generation does not work on servers with this fix).

[paulypeter]

Could you try wrapping the tk import in a try-except block in config-generator.py instead?
Does it a raise a ModuleNotFoundError or an ImportError?

try:
    import tkinter as tk
    from tkinter import ttk
except Exception:
    ...