Option in settings to warn if detected speed of USB burner is < USB 2.0

[njg1971]

I had a fluke with a burn I made today where the Device Buffer was barely filling and the burn went very slow (would have taken four hours so I cancelled it).  Checked the logs against the log made during a successful burn yesterday with the same discs.  Turns out my external usb 2.0 drive was detected as usb 1.1 for some reason (suspect it happened when I had it in sleep).  Disconnecting the drive and plugging it back in fixed the issue and I was able to burn normally though sadly I made a coaster out of a DVD-DL disc.