bug in gitk: history moves right when scrolling up and down with mouse wheel

Hello,

I don't know yet how to reliably trigger that, but it feels scary.

If that help, it happens with the view

	{karo {} ^linus/master {git for-each-ref --format='%(refname)' refs/remotes/customers/karo refs/heads/karo}}

If I knew how to record a video of my screen, I'd do this.  Maybe
someone knows?  Maybe this report is already enough?

Happens with Debian's git 1:1.7.2.3-2.2.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |