Merge branch 'drawfill-fix-2' into 'master'

DrawFill made not stupid

made it more consistent with other drawing functions; doesn't draw off of the sides, and doesn't ignore snapping or widths for reasons that don't make sense
(for instance: the green bar in MI's test script showed *above* the blue one in non-green resolutions in 2.1.17)

See merge request !173