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Peter Penz authored
Use KDirSortFilterProxyModel::naturalCompare() to prevent code duplication. DolphinSortFilterProxyModel::lessThan() still contains similar code like KDirSortFilterProxyModel::lessThan(), but we will discuss this with Rafael in August (it's open yet whether KSortFilterProxyModel should be derived from KDirSortFilterProxyModel or not...). CCMAIL: ereslibre@gmail.com svn path=/trunk/KDE/kdebase/apps/; revision=691028
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