Backup History - Add "No Results" Icon

On the backup history page add a "No Results" icon for all computers that have the agent installed but are either offline or for which there is not backup on the days covered by the history view. The goal is to make it easier for our techs to see that backups might not be running on devices for which we think backups are running. For example -- device got mis-configured to run a manual backup instead of a recurring backup For example -- device got pulled offline due to hardware failure (meaning MSP360 was not uninstalled) and replacement device did not get backup software installed. The old device should continue to show up in the history report with "no results" until we manually unassign the license and remove the agent from the report.