Player Tracker: Use the portal name from chat

Uses the portal name function from the chat listing, which, for now,
renames the US  Post Office portals so it doesn't look like.

20m ago  US  Post Office
25m ago Some portal
35m ago  US  Post Office
55m ago  US  Post Office
Merge pull request #107 from vita10gy/po-tracker

Player Tracker: Use the portal name from chat