What functionality is missing? What is unsatisfying with the current situation?

I run a campaign where i have the campaign itself, that consists of different acts, which each consists of different adventures that each consists of different plot-articles.   The campaign plots tree in my case is very long and i have to scroll a while to get to the parts i want to edit.  

How does this feature request address the current situation?

If each level would be collapsible, i could find each articel faster and would have an better overview of the adventures in an act and the acts in the campaign.  

What are other uses for this feature request?

None that i can think of.