Remove Solid-Colorful

[wilgaboury]

Currently using a dependency called solid-colorful to provide a widget for the background color picker. This plugin is a port of react-colorful to solid, is slightly janky and maybe a little bloated to have as a full blown dependency. The kicker is that the author has apparently lost the source code and only has the minified code from when it was uploaded to npm, meaning that it is impossible to make PRs to fix some of it's issues. The plan would be to fully remove the dependency, look at the react-coloful source and write my own stripped down clone.