Convert desktop files to JSON, port KCMultiDialog
In KF6, KPackage no longer reads the desktop files, but only json files
Task: https://phabricator.kde.org/T14558
cc @vkrause
In KF6, KPackage no longer reads the desktop files, but only json files
Task: https://phabricator.kde.org/T14558
cc @vkrause