Review Request: Add "Sort Folders First" option in the file dialog

[Frank Reininghaus]

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http://reviewboard.kde.org/r/2863/
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Review request for kdelibs.


Summary
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It was recently noted on kde-core-devel that the file dialog's sorting options lack the "Folders First" setting that Dolphin has since 4.3 [1].

This patch implements that, such that the "Sort" menus in Dolphin/DolphinPart and the file dialog are the same again.

I know that the change is rather small, but I thought I'd better get some review before committing because it's a new feature and because I used a rather hackish approach in KDirOperator::Private::updateSorting(QDir::SortFlags sort)
to re-sort the files&folders if the new setting is toggled. If anyone has a better idea how to achieve this, please let me know.

[1] http://lists.kde.org/?l=kde-core-devel&m=126517610620319&w=2


Diffs
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  /trunk/KDE/kdelibs/kfile/kdiroperator.cpp 1087568 

Diff: http://reviewboard.kde.org/r/2863/diff


Testing
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Works as expected for me.


Thanks,

Frank