feature request - add recent compile server IP addresses to list...

[glynhh]

This is only a minor comment, but thought I would raise it...
I use Chromeduino2 in an educational setting for 9 year olds.
I find that typically we burn about 5-10 mins at the start of each 50 min class with setup issues. Currently Chromeduino2 remembers the previous compile server IP that was used. But that address only appears as text down the bottom, but not in the list of available compile servers. Sometimes I have needed to change the IP for a class, then revert back the next time.
It would be great if upon a successful attempt to connect to a compile server, that IP was added to the items in the list of available compile servers.