Please add CSS to Advanced Icons (Sidebar)

Hi could we please have the option for the element's custom CSS as an icon in the sidebar. Similar to Recoda 1.0 I know that it's been added in the box model, but the issue is that the box model tab takes too much vertical space and im not able to see anything in the elements appearnce controls, so I have to keep closing and opening it. (I work on a 14" laptop) The implementation in 1.0 was perfect, if we could have that option back it would be great