We are introducing a new feature for our customers. By clicking on the bokmarking symbol the user is able to save an item to a list. The user starts out with a "default list", but may create as many lists as they wants. You may think of lists as folders (only one level deep) you bookmark items in. In the ADD TO LIST section the user has the option to search or sort the list to easier find it. (in the example below the user has created 10+ lists on his own already)
My question is should I position the Create option at the top or at the bottom (see images)? What is the user expecting intuitively? I know what I think, but I don't want to base the decision solely on that. Is there a best practice to follow here?