Thanks Jesse, and apologies for late response.
I think it could be valuable to have the outline in the project sidebar reflecting the outline in the main window, i.e. if I fold something in the main window, it folds the same in the project sidebar. Right now this gets me confused some times, especially if I focus on a project I still see everything in the project sidebar. To me, that adds noise that I am trying to filter out when focusing. Same thing when I do a search for a tag, I would love it if the sidebar only showed the projects that were actually included in the search.
A use case: I have my project list divided in two major parts, private and work. After that comes area of responsibility in GTD-terms, such as ‘Product Owner for X’, ‘Project Manager Project Y’, etc. Under each one comes a list of projects, such as ‘Publish Release Plan to Home Page’, ‘Next Years Budget handed in’ etc. This list becomes quite long, and it is really useful to able to focus on just ‘Product X’ without seeing that I need to buy a new pair of shoes for my daughter, contact a customer on a different errand etc. Thus, focusing on that main project removes all noise EXCEPT for the project sidebar. If that was focused as well, with the ability to fold/unfold, it would make it more clean for me to work in.
Does this make sense?