Move code to send signals and set priority of processes to a dedicated object
Summary:
This pulls the code out of KSysGuardProcessList and introduces it in a
new class called ProcessController. This should help make that code more
reusable and allow it to eventually be exposed to QML.
Test Plan:
Start ksysguard, try to send signals to processes and set priorities, including
root-owned processes. Everything should still work.
Reviewers: Plasma, davidedmundson
Reviewed By: Plasma, davidedmundson
Subscribers: davidedmundson, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D23566