A pattern fill imported with a preset (prstClr) or system (sysClr) color
turned that color black on any change in the gallery or either color
menu, because the color parameter fell back to #000000 for those bases.
Color parameters now carry them as {"preset": name} and
{"system": name, "last": "#RRGGBB"}, with their transforms, and the
engine reads both forms.
A pattern swatch with keyboard focus now gets the same outline as a
hovered or selected one.