Summary: This then invokes the relevant KCM when clicked
Test Plan:
Forced software rendering, saw SNI
restarted, saw SNI
set "never show again". It hid itself
Restarted. It remained hidden
Reviewers: #plasma, broulik
Reviewed By: #plasma, broulik
Subscribers: alexeymin, broulik, plasma-devel
Tags: #plasma
Differential Revision: https://phabricator.kde.org/D12679