Use better, less technical, and more consistent strings for name, comment, and GHNS button
Summary:
Change the KCM's name and comment to match one another and be less technical.
Also Implement consistent text format as decided on in T9941.
Test Plan:
Reviewed By: apol
Subscribers: apol, plasma-devel
Tags: Plasma
Maniphest Tasks: T9941
Differential Revision: https://phabricator.kde.org/D16502