include color in folder visuals

[KrabCode]

the inline folder display can display a toggle or a name based on specific names of inner elements as a shorthand for seeing which folder controls what.

it would be nice to also have a color preview when the inner color picker is named something like "color" "stroke" or "fill". maybe incorporate it into the folder icon as a stroke and/or fill, but leave the shape unchanged to still indicate a folder underneath.