AwwColorToolButton
------------------
+ Custom icon.
+ Icon tinting.
+ Fix label.
+ Menu proxy.
+ Split out AwwPaletteToolButton.

AwwPaletteToolButton
--------------------
+ Split out base class from AwwColorToolButton.

AwwTableToolButton
------------------
... implement, deriving from AwwPaletteToolButton.

AwwNumericEntry
---------------
... implement

AwwSpinButton
-------------
... implement