Mouse scroll artifacts

[walles]

Try this:

• moar --debug /etc/passwd (file name doesn't matter, can be any text file)
• Scroll mouse wheel a bit up / down
• Press q to quit

Expected result

Not much

Current result

Lots of Unhandled rune keypress log messages.

I'm guessing this is really a problem with https://github.com/gdamore/tcell, but it could also be something else.

[walles]

Fixed by eace3816646dc498f21b4de5f8e3b99f3aa15dcd, released in 1.1.