Magnifier Tool and zoom with Output/Input side-by-side

[tomczak]

Magnifier Tool, when magnifying Output/Input side-by-side, at higher magnification factors, seem to do just that, but the Input image on the left and the Output on the right are not separated (by a line or gap). The reason I mention it is that for some images it is difficult to tell that one is looking at two images side-by-side - I was confused, hence the report.

[jsachs]

Fixed for next release