Ontology tree view needs improvement

[amalik01]

The ontology tree view widget has some limitations when browsing the ChEBI ontology. It is only showing the is_a relationships and not the has_role relationships. Can the latter relationship also be included?

For example for roles, it shows the role hierarchy but the not the chemicals that have the specific role. Below is the hierarchy for food anticaking agent in OLS:

In ChEBI, we have 5 chemicals that have this role:

Can the widget be improved so that when users browse the tree view for food anticaking agent, they also see the list of chemicals that have this role (same goes for all other role classes). Thanks