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.

Auditors: rempt
Ref T2337, T2438