FR: Display whole tree in Tree view

[Sanqui]

I would like to see the entire tree in the tree view, not just the "down" entries. Ideally, I would be able to choose how many levels of parents to show. The current note should be highlighted in bold.

[csss1234]

(Could probably merge w #556 )

+1 for current note in bold. And let us see this notes “up”, but sorted from up to down, Then it would behave like most file systems

> [parent]
   > [this note]
       > [child]
       > [child]