Small bug fixes
Summary:
Increase points to 120 by default. This shows smoother heat up plots since they come every second
Check for selection before print / delete actions
Reviewers: Atelier: AtCore, tcanabrava
Reviewed By: Atelier: AtCore, tcanabrava
Subscribers: Atelier: AtCore
Tags: Atelier: AtCore
Differential Revision: https://phabricator.kde.org/D13427