Add a view for host groups

Good news — host groups arrived in NagMon 2.0.1. On the Hosts tab you'll find a new toggle that groups the list by host group: hosts are shown in sections, one per group, with any hosts that don't belong to a group collected under "Ungrouped." Your preference is remembered, so the
tab stays in group view once you've switched it on.

One note: this relies on your Nagios server's objectjson.cgi endpoint (standard in Nagios 4.x). If your server doesn't expose it, the toggle won't appear.

Update to 2.0.1 and give it a try — and if you'd like host groups surfaced anywhere else in the app, let us know. Thanks for using NagMon!