D15463: Corrected behaviour on repeated pressing of operator buttons

[Christoph Feck]

cfeck accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R353 KCalc

BRANCH
  feature/chop

REVISION DETAIL
  https://phabricator.kde.org/D15463

To: mschiller, cfeck, teran, #kde_applications
Cc: aacid, cfeck, kde-utils-devel
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