[BUG] Duplicate log entries

[mrjackwills]

Describe the bug
Have, on occasion, seen duplicate log entries in the log panel

To Reproduce
So far difficult to replicate

Expected behavior
Should only display each log entry once

Fixes
Should always record timestamp with each log entry, maybe in a tuple (timestamp, log_entry), and then only insert into the log Vec (or ideally a HashSet), if the (timestamp, log_entry) is unique.
Would need to change the way the -t arg is interpreted in order to display, or not display, the timestamp