Port elisa kcm to qqc2

Summary:
Port to the local file kcm to qqc2, no visual and functional change
CCBUG: 405144

Reviewers: mgallien, ngraham

Reviewed By: mgallien, ngraham

Subscribers: ngraham

Tags: #elisa

Differential Revision: https://phabricator.kde.org/D21920