FMod - Color editor designed

For a while, I pondered how to lay out the UI for the colors section of Abiathar's new settings window. At first I considered having a repeating group of controls, but that would be a lot of controls total because there are several parts to configure each color (hex entry, color picker button, preview, and opacity slider). Instead I decided to go with a single group of controls and have it apply to whichever color the user selects from a list of configurable colors. It might be possible to do some custom painting of the list box to show a preview of every color without making the user click on one to see it, but that's optional.