Ticket 50289 - Fix various database UI issues
    
    Description:
    
    Fixed these issues:
    
    - https://bugzilla.redhat.com/show_bug.cgi?id=1664621 - backup freezes when no suffix present
    
    - https://bugzilla.redhat.com/show_bug.cgi?id=1685395 - Perform Backup fails when Backend Name is not configured
    
    - https://bugzilla.redhat.com/show_bug.cgi?id=1688587 - typo when restarting instance
    
    - https://bugzilla.redhat.com/show_bug.cgi?id=1688775 - db tree breaks when suffix contains spaces.
    
    - https://bugzilla.redhat.com/show_bug.cgi?id=1688919 - backups fail with empty name
    
    Also fixed issue where if you start an instance in UI the configuration is correctly loaded.
    
    https://pagure.io/389-ds-base/issue/50289
    
    Reviewed by: spichugi(Thanks!)