Drop org.kde.* own-name

[bbhtt]

This is no longer required with any supported runtimes, the issue was fixed in Qt

https://docs.flatpak.org/en/latest/desktop-integration.html#statusnotifier

Most implementations of StatusNotifer have dropped this requirement

https://github.com/flathub/flatpak-builder-lint/issues/ 66#issuecomment-1386033025

[flathubbot]

Started test build 69349

[flathubbot]

Build 69349 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/52003/nz.mega.MEGAsync.flatpakref

[tim77]

Quick test: OK. Thanks!