Enlarge the coding window by uplining the "Add Dependency" button
It seems like the single and not frequently used button of "Add Dependency" could very well fit in line with the "Function Editor" and "Settings" buttons, and all the space allocated for it could make more room for the main focus wich is the coding window.
It only takes adding one css property of "margin-top: 65px;" to the "function-editor-add-dependency-button". just like this:
display: flex; // exists
justify-content: flex-end; // exists
padding-bottom: 20px; // exists
margin-top: -65px; // new