Feature Request: make pkgmanager inputs for "purge" and "autoremove" optional (with default fallback to "remove")

[kbdharun]

As requested in https://www.reddit.com/r/vanillaos/comments/1fcebhu/adding_new_package_manager_or_subsystem/

[nellfs]

I'll add the original comment here, so we do not depend on the Reddit comment

I tried using the Apex GUI but regardless of whether it's in the GUI or CLI, some package managers don't have all the flags (e.g. purge, autoremove, etc) that the "add package manager" tool forces you to define otherwise the "create" button never lights up in the GUI.
Also, are we supposed to specify a URL in the "base" section when defining a stack? All this seems much more complicated than simply using distrobox create docker_image:latest

This issue is about the first part.

[jardon]

This was closed with #415