Right Click on Foreground/Background

[Benjamin B. Thomas]

I just noticed in 1.1.9 that right clicking on either the current foreground or
background color in the tool box does nothing (until you drag it, that is). It
seems like it would be extremely useful to have this produce a drop down list
display of the last N colors used as either the foreground or background,
respectively. 

I apologize if there is already an easy way to select a recently used color, and
I missed how to use it. 

Cheers,
benjy