[mobile/wifi] Use ScrollViewKCM
Summary:
This gives the KCM a proper frame/scrollbar
Needs D27562 to not always show the error message bubble
Test Plan:
Before:
After:
Reviewers: Plasma, jgrulich!, ngraham
Reviewed By: ngraham
Subscribers: ngraham, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D27563