Feature Request: Expand/Collapse all in right-click menu

[vertigo]

When right-clicking on the head of the tree ("Blur-ray disc"), it would be very helpful to have an expand/collapse all option. This feature was requested ~5 years ago, and I definitely agree that it should be added. I see after reading that thread that they can be expanded with the * key, so that's helpful, but I've wasted a TON of time doing it manually because I didn't know that trick, and having it in the menu would accessible without having to somehow know that as well as remembering it. Also, while they can currently be expanded with the *, they can't be collapsed automatically.