Update cinnamon-session to version 6.0.4 / rev 28 via SR 1161158
    
    https://build.opensuse.org/request/show/1161158
    by user dirkmueller + anag+factory
    - update to 6.0.4:
      * cinnamon-session-quit.py: Set logout window to keep-above and
        all- workspaces.
      * csm-manager.c: Use the /tmp dir for the dialog server's
        socket file when logged in to a guest account.
      * Packaging: Add missing build-dep on cinnamon-desktop
      * session-quit: Use a unique dialog server address for each
        session.
      * cinnamon-session-quit.py: Try the old fixed server address if
        the session manager doesn't provide the "sm-bus-id" argument.