D29479: Fix rounded borders

[Niccolò Venerandi]

niccolove edited the test plan for this revision.

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D29479

To: niccolove, #plasma
Cc: kde-frameworks-devel, LeGast00n, cblack, michaelh, ngraham, bruns