Changing format of PM Timestamp to make logs less confusing

(13:02:38) Fuzzy: This is a PM!
(12:56:03) Fuzzy: This is a chat!
will turn into
[13:02:38] Fuzzy: This is a PM!
(12:56:03) Fuzzy: This is a chat!

Making it much easier to tell when someone with PM seconds posts a log in Indigo/VR.