Collapse all Visual Studio toolbox regions shortcut

Is there a keyboard shortcut or macro to collapse all regions in Visual Studio's toolbox? (Failing either of those, I'll take an addin that allows this!)

While the focus is on the toolbox, press / to Collapse All.

You can also Expand All by pressing SHIFT+8

Here's an article by Sarah Ford with more information: Visual Studio Tip #186

BEFORE:

_{(source: msdn.com)}

AFTER:

_{(source: msdn.com)}