You can use VCS Groups to keep track of which version-controlled files have changed in your working directory by automatically adding all modified files to the default group.

Choose VCS Groups from the Versioning menu in the main window. Right-click the VCS Groups node and choose Properties. Then set the Auto Addition property to Move Modified Files to Default Group. Each time you modify a file in a VCS filesystem, a link for the file is created in the Default group in the VCS Groups window.