Color Picker bug
when i pick color, if the pciker is near panel bottom,it will always immediately  to left.

![2020-11-14 17_42_19](https://user-images.githubusercontent.com/17842612/99144412-a6344b80-26a0-11eb-8932-d3589504b54a.gif)

expected:

![2020-11-14 17_45_14](https://user-images.githubusercontent.com/17842612/99144448-f4e1e580-26a0-11eb-86de-465e55ae698f.gif)

