D24782: Port away from deprecated BarIcon method

[Ahmad Samir]

ahmadsamir added a reviewer: mlaurent.

REPOSITORY
  R75 PIM: Calendar Support

REVISION DETAIL
  https://phabricator.kde.org/D24782

To: vkrause, mlaurent
Cc: kde-pim, fbampaloukas, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss, dvratil
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