Eusebiu's SharpDevelop blog
There's a new feature in SD 4.0 called Collapse all for project/classes pads. It is useful when working with many projects.
A similar feature in the unit test pad would be useful. Also why not make it an expand all/collapse all toggle button.
Hey... I just added that option to unit-test pad too.
For the second issue, I don't think is quite helpful for large projects.