Just an enhancement proposal: When a new clipboard entry is created and it exists already in CopyCat (e.g. String equality), instead of creating it anew, remove the existing entry and make it the newest.
Example String "Hiya" has been copied 2 days ago into clipboard and was saved in CopyCat. Equal string gets copied again. Older String gets moved to the top of the list.
I won't go into implementation suggestions - this is purely how I'd love CopyCat to behave π