We should not forget the launchers that are not currently shown
Summary:
The pinned launchers that are assigned to other activities
will have a -1 as the order. We should not forget them
when saving to the configuration file.
Reviewers: hein, mart
Reviewed By: hein
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D5933