Clear color history
This function allows you to clear the color history of the color selection panel and the context menu.
A color is added in the color history each time you use a different color on the drawing.
Color is added to the history only if it is not already present in the history.
By default, 20 colors can be added to the history. Beyond 20 colors the oldest color is removed from the history and the new color is added.
The number of colors in the color history can be changed in the User settings.