Gracefully handle full command reinput during prompting

[Gawdl3y]

When a user reenters the full command w/ arguments while the framework is prompting for arguments, it should gracefully re-parse and start over from the beginning with the new input.

[brandonbothell]

Should it allow the full command with only some required arguments to be entered, or just the full command with all required arguments?

[Gawdl3y]

It should essentially behave as a fresh input of the command, starting over. Maybe even support using a different command?

[jonahsnider]

At this point, isn't that just cancelling the command with an error message ("you provided incorrect arg type...")? Especially if it's accepting a whole new command.

[Gawdl3y]

No, the point is to avoid such an error message.