Track the lastCommand set to the printer
- Track the last command sent to the printer to allow for command/ return pairing.
- Use this now power to fix a bug where any X could set posString that could later be problem is you paused a print.
Reviewers: laysrodrigues, patrickelectric, tcanabrava
Reviewed By: patrickelectric, tcanabrava
Subscribers: Atelier: AtCore
Tags: Atelier: AtCore
Differential Revision: https://phabricator.kde.org/D18468