Bug 361965

launcherUrl in taskmanager is ideally the absolute desktop file there is stripping logic in place in the tooltipdelegate.qml 

>         readonly property string current: {
>             var split = launcherUrl.toString().split('/')
>             var appName = split[split.length - 1].replace(".desktop", "")
>             return appName
>         }

but this fails to strip RDNs (it supposedly shouldn't either because RDNs add uniqueness to the task that is lost when removing the RDN).

As a result org.kde.dragonplayer is not correctly mapped to the mpris source 'dragonplayer'.

To resolve this either the RDN should be stripped (which is a meh but probably acceptable approach) the most reliable solution would be to use the DesktopEntry property on the mpris interfaces [1] to get the actual desktop entry name associated with that mpris interface which then allows a 1:1 mapping between the launcherUrl and an mpris interface.

(Note: DesktopEntry() is optional so the existing way could still be adjusted to accomodate RDN and act as fallback if DesktopEntry is not present)

[1] https://specifications.freedesktop.org/mpris-spec/latest/Media_Player.html#Property:DesktopEntry

Reproducible: Always