Design changes for users have open the toolbar all the time

Is it possible to have some changes in the design of the toolbar for users having the toolbar open all the time? Saving some space for the code window.

Something like this:

Start by reviewing the extension's toolbar UI and the attached screenshot to identify where the always-open toolbar is implemented. Clarify the intended space-saving design and acceptance criteria before changing anything; done means the toolbar preserves its required controls while giving the code window more room.

Written by the indexing model from the issue text.