Change "Created by" to a more accurate text for Drip List owners

[nya-elimu]

A Drip List's "Created by" address in the UI is not accurate because a creator can transfer the Drip List NFT to a different account after creating the Drip List. And when that happens, the text "Created by" no longer makes sense.

Rephrase to something more accurate like "Owned by" or "Controlled by"/"Managed by"