D17143: Pixel-align the sidebar's flickables to prevent artifacts when scrolling

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: Plasma, Kirigami.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  By pixel-aligning the flickables, we eliminate text clipping artifacts caused by scrolling with a touchpad.
  
  BUG: 393202
  FIXED-IN: 5.12.8

TEST PLAN
  Scroll over sidebar with a touchpad; no more artifacts!
  
  [video goes here]
  
  [Ignore the flicking in the video; I'm not sure why that happens but it's an artifact of the software (SimpleScreenRecorder), not something that actually happens]

REPOSITORY
  R124 System Settings

BRANCH
  pixel-align-flickable-scrollviews (branched from Plasma/5.12)

REVISION DETAIL
  https://phabricator.kde.org/D17143

AFFECTED FILES
  sidebar/package/contents/ui/CategoriesPage.qml
  sidebar/package/contents/ui/SubCategoryPage.qml

To: ngraham, #plasma, #kirigami
Cc: plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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