Create an option where the dock extends but has rounded corners.

[ajstrongdev]

I was wondering whether it was possible that we have the COSMIC dock extend to the edges, but have the rounded corners and border that we see from the dock when it is not extended. I feel like this feature will solve a lot of gripes I currently have with the COSMIC dock (I feel like non-extended looks prettier but I wish it extended so that there wasn't a massive gap between the dock edges and the application)