Move KoDualColorButton, attach internal color selector.
It doesn't crash, it updates, gets updated, can select colors, wide gamut colors, changes configuration based
on selected color's color space... It still needs to be cleaned up and have fluid updating. Also 90% of the rest of
the selector, but I first want to get this updating slot signal mess clean.
Can I keep using QObject::sender()? It's making my life very easy.