D13777: KMessageWidget : revert to using highlight colour for Information style (WIP)

[Nathaniel Graham]

ngraham added a reviewer: VDG.

REPOSITORY
  R236 KWidgetsAddons

REVISION DETAIL
  https://phabricator.kde.org/D13777

To: rjvbb, ngraham, #frameworks, #vdg
Cc: aacid, cfeck, kde-frameworks-devel, michaelh, ngraham, bruns