First layout changes

Made a few updates to the app layout. I've added a swatch saving feature and swatch selection tool, seen in the bottom second row. I've also made the foreground color a permanent dark gray, which helps the background color that's been selected not get lost.

The remaining elements, including the window bar, color blindness options, and contrast preview all retain dynamic background colors depending on what colors the user has set as their background color and if they've enabled any color blindness options