[Feature Request] Account colors in "All Folders" view

[sgart-git]

I have set a color per organisation for my mailboxes but fluentbird removes the icons that use these colors. The icons themselves are not important and can be removed. The missing colors make it seem a bit bland and hard to differentiate between accounts without reading the name.

All Folders view without theme

All Folders view with theme

Edit: Image descriptions added and formatting

[sgart-git]

A possible implementation of the colors could look like this