D5007: Fix weird scrolling artifact when the viewport is bigger than the content

[Aleix Pol Gonzalez]

apol created this revision.
Restricted Application added a project: Kirigami.
Restricted Application added a subscriber: plasma-devel.

REPOSITORY
  R169 Kirigami

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D5007

AFFECTED FILES
  src/controls/templates/private/ScrollView.qml

To: apol, #kirigami, mart
Cc: plasma-devel, apol