Implement all Adjustments > Auto Enhance tools

Auto enhance colors, contrast, and lighting are now available.  As
mentioned earlier, these are not adaptive techniques (like the Auto
Correct functions).  They are naive, meaning they work the same way on
all photographs, and their purpose is to give beginners a one-click way
to punch-up various image aspects.

I've erred on the side of "too weak" instead of "too strong" for these
functions, so hopefully they do not overwhelm images - but if that
happens, the Edit > Fade function would be particularly à propos.