Every time Cliperado takes screenshots of your service, it also stores all the links & forms. As well as the position of these elements on the screen.
The colored overlays you see in the screenshot are the links and forms Cliperado found.
Current selected link in the sidebar, highlighted on as yellow on the screenshot.
This link is already in the sitemap.
New link, not in the sitemap yet.
Ignored link, you don't want to put this link in the sitemap.