Syncronise environment to user systemd session
Summary: Equivalent of dbus-update-activation-environment but in runtime
Test Plan:
Changed cursor theme (with some additional fixes there)
Checked the systemd env via the property on manager1.
It had changed
Reviewers: Plasma, broulik
Reviewed By: Plasma, broulik
Subscribers: broulik, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D27054