Improve server local address/external address flow

[Moussa]

Instead of waiting for all servers to respond to ping, use external address in meantime and then switch over to local address if successful ping. Will require a lot of code rewrite. Plugins need to use global server addresses and pull their own metadata xml instead of relying on main js.

[joshstrange]

Is this something that would cause the loading icon to never end and duplicate on every "page" navigation? I haven't been able to use this plugin for a while now due to it never fully loading and would love to know what's needed to make that happen.