Rotate background images on refresh

[gitmotion]

it would be awesome to see if we could randomly switch or rotate the background images for the flow on refresh so it's always displaying a different image. I saw that when you upload a background image it retains in the public folder (if you don't mark to delete) and wonder if we could add a checkbox/functionality that allows rotation to next random image on each refresh

as well as, add functionality to pick from the images that already exist in the \media\public\flow-backgrounds folder

currently you have to navigate to the container directory to change this or delete previously added images