De-duplicate KCMs based on plugin id of converted KPluginMetaData object
In case of KIO, the KCM metadata files need to be kept for compatibility, but they reference the KCM in a proper Plasma namespace. However we need to set the plugin id explicitly in order for the desktop file to be found then the KCM should be pinned. This means that de-duplicating based on the library name no longer works.
Edited by Alexander Lohnau