[Feature Request] Model Tree to visually indicate either an element if a parent/container or child/contained

[flippinnora]

Description

Enjoying using the tool folks.

When reviewing model trees to it was a little bit time consuming to orientate myself around which things I had "grouped" via the containerisation feature.

I wonder if you could consider the following to provide a clue/filterable property on the model tree?

ParentElementHasChildren (+)
ChildElementIsAlsoParent (+-)
ChildElementIsLeaf (-)

So example - say I was capturing a decomposition of requirements:

MyLevel 0 Requirement (+)
MyLevel 1 Requirement (+-) - which tells me this element is part of a nesting relationship but isnt the root or the final leaf
MyLevel 2 Requirement (-)

The presence of the (+) or (-) or (+-) indicates some "contains" relationship to be aware of and whether I am at the root or a leaf node. The symbols themselves don't matter of course - these seemed useful shorthand.

This would be even more exciting if there was a "jump to" feature on right mouse but I know I can go to the analysis pane anyway for that - but this suggested visual indicator felt like something that could be an extension of the italicisation code ?

Thanks

Steve