The "edit parameter" panel (which appears on clicking on any of the parameters) has a "Done" action and a "Remove" action, but not a "Back" action.

Clicking "Done" updates the model with any new changes, and clicking "Remove" removes the parameter from the model.

However, if a user has entered changes but has decided not to make them, there is no "Back" button, to leave the panel without making any changes. Instead, they have to escape out of the dialog, or undo all their changes and click "Done".

We should implement a "Back" button, like the one in the "add parameter" panel.