Customize Wishlist popup

Hi, Your Wishlist plugin works as described. However, I have got feedback from my customers on the usability of it: it is not intuitive to click the hamburger icon to close a open Wishlist popup. Typically, the mental model is that popup closes when you click anywhere on the screen (outside the popup) or there is a close button (X). Is it possible to customize the plugin to close the Wishlish when a user clicks anywhere on the screen? Please clarify.