Change subject Line for Nagios Escalations

[scottwilkerson]

Before we could add it into Nagios XI it would first need to exist in Nagios Core. You can make a feature request here
https://github.com/NagiosEnterprises/nagioscore/issues

If approved it wouldn't be added until a major version as there isn't currently any tracking of "levels", and furthermore Core currently doesn't even have anything that indicates a certain escalation is a specific level as they can overlap.