Fix and improve renaming satellites for Nighthawk MR80/MS80

Hello!

As far as I can tell, there is no functional way to rename a satellite on a Nighthawk setup consisting of an MR80 router and two MS80 routers. There's an option to do so in the Nighthawk Android app, through Network Map, but it simply doesn't work. Entering a new name and tapping save does nothing; the change is not applied. I've tried this from several phones.

At minimum, the non-working app feature should really be fixed. What would be even better is if a function were also added in firmware so that satellites could be renamed in the web interface (e.g. 192.168.1.1), so there's a way to do it without going through the app. As far as I can tell, this option is not available at all. At least, I can't find it.

Thanks for your consideration!