D25899: Don't manually propagate sub-window icons

[Volker Krause]

vkrause created this revision.
Herald added a project: KDE PIM.
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REVISION SUMMARY
  Happens automatically nowadays. Also removes another use of the about to
  be deprecated IconSize() method.

REPOSITORY
  R168 Kleopatra

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D25899

AFFECTED FILES
  src/conf/configuredialog.cpp

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