D16137: Add an option to KConfigDialog to fit page contents horizontally

[Tim __]

kadabash created this revision.
Herald added a project: Frameworks.
Herald added a subscriber: kde-frameworks-devel.
kadabash requested review of this revision.

REVISION SUMMARY
  Scrolling a settings page horizontally feels awkward most of the time.
  This (optionally) lets the dialogue resize when it is opened so that
  horizonal scrolling becomes unnecessary.
  
  Things I am uncertain about:
  
  - Placement of the "FittingScrollArea" class above the function where it is used, and its name.
  
  - "fitContentHorizontally" is off by default in "KConfigDialog::addPage()" so existing code using the function not break because of this change.
  
  This change was discussed in Phabricator Differential D16048 <https://phabricator.kde.org/D16048>.

REPOSITORY
  R265 KConfigWidgets

BRANCH
  config-dialog-content-fit (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D16137

AFFECTED FILES
  src/kconfigdialog.cpp
  src/kconfigdialog.h

To: kadabash
Cc: kde-frameworks-devel, michaelh, ngraham, bruns
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