Add workarounds for critical bugs in Rawhide
    
    An lvm2 issue which breaks the installer (#2180557) and anaconda
    renaming the .desktop file for the Workstation live welcome
    screen, which caused it not to appear -
    https://pagure.io/livesys-scripts/pull-request/12 .
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>