Colorwise sorting of colors in the palette

Problem/Motivation

Sort colors based on color-gradient, i.e., similar colors to appear close to each other in the palette.

Proposed resolution

May be similar to what has been achieved here https://www.hashbangcode.com/article/color-sorting-php#:~:text=This%20pr....

User interface changes

Add an additional button 'Reset colorwise' at admin/structure/taxonomy/manage/colorpalette_colors/overview page.