Widened the packets-sent column making it more useful for long-term anal...

I made the packets-sent column wider.

I've been using MTR to demonstrate to my cable ISP a long-term problem with packet loss entirely within their network, but it's meant leaving MTR running on a test machine *literally* for days at a time, which meant the packets-sent column was truncated/inaccurate after a little more than a day.

With this width, it can report a LARGE number of packets sent allowing for effective use in long-term analysis.