Auto Scroll Not Useful On Serial Message Shift

[FrankLaterza]

When new data comes in and you're not at the bottom your place in the serial streams changes. Can't read values when not auto-scrolling. The problem arises from the rolling serial log. It pops off the first thing added and pushes on the newest. This queue behavior keeps the memory low, but when the data gets shifted it's hard to read the data on screen. A possible solution is to detect the shift and displace the scroll.