This patch ports the KCM to QQC2, which has the side effect of working around https://bugreports.qt.io/browse/QTBUG-70481 and improving the presentation for people using fractional Qt scale factors.
BUG: 397954
FIXED-IN: 5.15.0
WIP because the scrollviews don't actually scroll when the content is too large for the frame. Haven't figured out why yet.