Minor improvement of multi-node info

[zcsahok]

• mark own node on frequency display (Alt-J)

• on :INFo panel add own node name if LAN is active. Added "Total" to the received stats to visually separate it from the per-node stats.

I see no way to correlate the host names to node ids due to way it's set up. It would be maybe better to have a configuration like this

NODE_A=biggun1
NODE_B=biggun2
NODE_C=rxonly
THISNODE=B

Sending frequency info only each 2 minutes is also somewhat not optimal IMO.