Allow for monitoring a port range

[djbr22]

Is it a duplicate question?
no

Is your feature request related to a problem? Please describe.
Not really a problem, but I'd like the ability to monitor multiple ports from the same monitor. I.e. - monitor a range of ports.

Describe the solution you'd like
Either allow me to set a port range (16000-16002) in the TCP/Port field, or allow me to add multiple ports to a monitor (TCP Port 16000, TCP Port 16001, etc). Optionally would like the notification to specify which port went down.

Describe alternatives you've considered
Currently I have to create multiple monitors for the same IP and give each monitor a unique name like Application-16000, Application-16001, etc.

Additional context
Useful for single applications that use multiple ports. It would reduce the number of monitors displayed on my Status Page.

[deefdragon]

This would likely be best done via #639 or #549 with the creation of subgroups/collections. Unfortunately each monitor would still be individual. There may be a shortcut for creating subgroups/collections in the future if they get added however, adding all the checks at once.