TOC view for each kind of item in outliner

[Daniel]

I just wanted to throw this idea in. Maybe someone finds it interesting. 
It certainly needs more thought before it could be implemented.

Currently, the outliner provides a plain list of each kind of item, e.g. 
a list of all citations within a (master) document. This is very handy 
for looking and going through the whole list, or find related items such 
as all references to a label.

However, often I would like to go to a particular item that I know is in 
a certain chapter, section or such. Some kind of "TOC view" would be 
helpful.

One way to do this would be to add extra items to the list with numbers 
and headings according to the TOC. Maybe they would be grayed out.

Another, more interesting idea, is to have a foldable list as in the TOC 
but be able to control its depth, so that one can find an item, e.g., in 
a chapter more easily even if one does not know in which subsection it 
occurs.

One might even go for only this new "TOC view". Then from the drop down 
list one can choose which additional items to show in the TOC, 'None' 
being one option which gives the classic TOC. The depth can be adjusted, 
so that a depth of 0 just means that one gets the plain list of item 
type selected, e.g., citations if they are selected. Some items will 
appear grouped when a depth of 0 is selected, e.g. references under labels.

Daniel