Problem with location of the zero on the slice line

[mlesnick]

when opening the data file

senate104_RIVET_Codensity20thPercentile.txt

in rivet_GUI with H0 and 50x50 bins, the parameterization of the slice line is not as intended, leading to a display of the persistence diagrams different than intended.

In the image, note the dots in the persistence diagram all the way to the left. They should be on the dashed line, not to the left of it.

Interestingly, this problem also arises for 25x25 bins, but not for 10x10, 11x11,
40x40, or 100x100.

Also, the intended behavior is attained after selecting "View-->Restore Default Window."