How can I separate the tabs in the Side Pane?

 From:  sneather
7068.1 
For so long, I've just used it as is, but it dawned on me that it would be much more efficient if I could separate the tabs in the side pane. I'm always clicking between "CONSTRUCT" and "TRANSFORM" - so it would be great to simply have both available at the same time. How would I go about modifying that?

Thanks!