Project Workbench behaviour

I have created a custom project workbench.  For the most part, I've utilized the seeded structure for the workbench, but I wanted to add a couple of extra sub-tabs.

From the action list on the Tasks page (Main Tab Workplan, Sub Tab Tasks), I took the function behind the option "Update Work Breakdown Structure" and added this function as an additional sub tab under the Workplan.

So instead of the users having to use the action drop down, they just click on the sub tab. 

This actually works, but it has one quirk.  The page looks like you are still on the Tasks page.  Main Tab Workplan, Sub Tab Tasks is still bolded instead of the new sub tab just selected.