List sub-projects in sidebar
I use sub-projects a lot to manage tasks and I have found it inconvenient to have to drop back to the full projects list every-time I want to dig further into sub-projects.
When viewing a parent project, there should a list of sub-projects listed on the sidebar.
As it is now, you can easily drop back up to the parent project form a sub-project via the breadcrumbs. It would make sense to have an easy way to get back down into them from parent projects.