Yep, I even created a topic with question of the reason of rotating triangle (that has a place not only in Krita), here and through the web still didn’t find an answer.
You can modify the kritarc, add at the beggining:
popuppalette/usevisualcolorselector=true
There is the topic about developing a pop-up palette, still I don’t know how it is going since last post was in august.