Minor code improvements

Summary:

• more debugging
• more comments
• for two buttons emit toggled instead of clicked regarding changed
• add authorship info

Test Plan: it compiled and still worked

Reviewers: davidedmundson, ngraham, Plasma

Reviewed By: davidedmundson, ngraham, Plasma

Subscribers: plasma-devel

Tags: Plasma

Differential Revision: https://phabricator.kde.org/D22981