Cropped single edge images now handled more elegantly in the GUI

A while back I wrote a post that described the "--single-roi" option of MTF Mapper. The "--single-roi" mode specifically allows you to feed MTF Mapper with images that have already been cropped to contain only a single edge, i.e., they look like this:

From MTF Mapper 0.6.20 onwards, you can now use the menu option File/Open single edge image(s) to load images that look like the one pictured above. Note that by opening an image using this new menu option MTF Mapper will automatically enable the outputs that make sense (Annotated image output, with the ability to click on edges to view the SFR curve), while silently ignoring all the output types that do not make sense if you only have one edge.