Improvement: click behaviour ColorString Widget

Clicks outside the color picker are handled by the fullscreen "ClickOutsideDiv" to close the color picker. That means if you opened the color picker and want to edit another field, you have to click twice, once for closing the picker, and then for the other field. That is not consistent with other widgets like "select" or "datetime", where you can click immediately from one field to another.

I guess it's quite easy, but I don't have the experience for a quick solution...

Start by locating the ColorString Widget and its fullscreen "ClickOutsideDiv" handling, then compare the click behavior with the "select" and "datetime" widgets. Reproduce the flow by opening the color picker and clicking another field; done means the picker closes and the other field responds on the first click.

Written by the indexing model from the issue text.