Ui.ColorPicker panel disappears inappropriately in Firefox

[crazymykl]

Steps to reproduce:

• Click on the picker to open it
• Click and drag on either the large grid or the two sliders

The controls are usable so long as the mouse button is held, they just close visually.

[gdotdesign]

This was the same issue as https://github.com/gdotdesign/elm-ui/issues/63 which was fixed in 1.1.0 I'm updating the website soon.

[crazymykl]

Thanks for the prompt response!

[crazymykl]

Validated as working now.