D5344: Relax constraints for processing QGroupBoxes

[Volker Krause]

vkrause created this revision.
Restricted Application added a project: Frameworks.
Restricted Application added a subscriber: Frameworks.

REVISION SUMMARY
  So far this was only accepting QGroupBoxes containing only auto-exclusive buttons. Now we also accept QGroupBoxes that contain non-buttons, as long as the buttons are still all auto-exclusive and direct children of the group box.
  
  This is closer to what KButtonGroup was doing and enables porting of uses of those in kdepim-runtime. Group boxes there contain e.g. additional labels with more explanations.

TEST PLAN
  Tested on the Akonadi mbox resource configuration dialog after a port to QGroupBox.

REPOSITORY
  R265 KConfigWidgets

REVISION DETAIL
  https://phabricator.kde.org/D5344

AFFECTED FILES
  src/kconfigdialogmanager.cpp

To: vkrause, dvratil, dfaure
Cc: #frameworks
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