dfafdc2 Wait for screen to settle during disk_custom_with_swap

Authored and Committed by adamwill 3 years ago
    Wait for screen to settle during disk_custom_with_swap
    
    Seems we can get the UI into a buggy state if we click the + too
    fast here on aarch64.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>