[Observium] USA States not dected.

Hello All,

Just a note a have a site in Trenton, MI not Trenton, NJ its listing them in NJ area on the Map. All my nodes have City,State IE Trenton, MI just something you might want to look at. Also it would be cool to have the ability to limit the map to a "area" like for me just the USA. I just use solarwinds for Alerting and everything else is Observium but it would be nice to have the map not show all the countries.

Keep up the great work the new layout looks GREAT!

Mike