When I have a bunch of planets in a system I'd like to DSS, it's always frustrating when I DSS a few and then can't remember which ones I've already scanned, requiring many trips back to the system map to check.
I think it would be a good idea to add functionality to the plugin to tell you which system bodies have already been 100% mapped by you. After you DSS a body that is already appeared on the Canonn plugin (such as a body that is under the Valuable tab), its name color should change to green. I believe this could be done by using the journal event that happens when a body is completely mapped.