Comment 1 for bug 361081

This is long fixed, I think. Changes from one upstream project to another, changes to the status, importance, assignee, and (I think) milestone, and removing a project altogether, are all updated without reloading the entire page.

Adding a new project, and changing a project to a package or vice versa, are not updated inline -- but only because the forms for those things aren't properly embedded into the table (bug 399756).