Open drone string moves the fret position upwards

[danBrunch]

If the fret position is 0 and the the open drone string (string 5) is played, the fret position changes to position 1. This is not realistic as there's no need for the left hand to move to play the open drone string.

This behavior doesn't occur if the drone string is forced by using the G#0 keyswitch or if Open String First is toggled on. However, while these are okay as workarounds, they are only workarounds - the fret position should not change to play the open drone string.