Browser back button should work as expected in the administration menu with Boost theme

A well known 'rule' of the web is not to compromise the functionality the browser's back button

Unfortunately, the admin pages do this. 

To reproduce....

• From the flat menu, choose site administration
• Select (for example) Appearance tab and then theme settings
• The theme settings form appears. 
• Press 'back'

You would expect to be back to the previous page - the Appearance tab. However, you are not. You are viewing the first tab of the administration menu.