Draft: Fix launch feedback on "Powerful When Needed" Page
By necessity, we use KIO::CommandLauncherJob instead of KIO::ApplicationLauncherJob a few times on this page. However that job won't give us launch feedback unless we manually wire it up. So let's do so.
BUG: 464668 FIXED-IN: 5.27
Draft because this still doesn't work for knewstuff-dialog
(where we pass an executable and icon, instead of a desktop file, because it doesn't have a desktop file) and I'm not sure why. I think I'm using the API correctly. @nicolasfella any ideas?