Currently whenever I make a change in the page's custom code and try to test it I need to save the code using the save button - which closes the custom code panel. Only then I can hit publish and test it. Then, if we need to go back to the code I need to go to the page's settings, find the custom code tab and scroll to the right part of the code.

I wish we could save the code and publish the project without having to close the custom code panel.