Selective Color dialog box too tall

[tomczak]

My screen is 3200 by 1800 pixels, I believe. The Selective Colour dialog box doesn't want to fit in it vertically. Reducing font size in Preferences helps, but I wonder if rearranging the dialog box a bit to make it wider than taller would be an option.

[jsachs]

I re-arranged some of the controls for the next release to reduce the minimum dialog box size.