showRecentColors property Null safety
Set to true to a list of recently selected colors selection at the bottom of the picker.
showRecentColors is enabled, the color picker shows recently
selected colors in a list at the bottom of the color picker. The list
uses first-in, first-out to keep min 2 to max 20 colors (defaults to 5)
on the recently used colors list, the desired max value can be modified
Defaults to false.
final bool showRecentColors;