Visual Studio Team System - The option that I've been missing all these years (Filter by Solution)

I've been using Team System for a number of years, and one thing that was frustrating was that the Pending Changes window showed all files in the current workspace. This becomes unmanageable when you have several projects sharing a workspace (whether that's "best practice" is irrelevant).

Today I happened upon the option that I've been thinking should exist but could never find: Filter by Solution.