How to get a collapse/expand product categories view?
We are on Odoo 8.
In the chart of accounts view, we can collapse or expand the view.
In the product categories view, even if we modify the action view type for "tree", lines are not collapsible and not expandable. All the categories appears.
How to get the same view than "chart of accounts" in the "product categories" view?
Thanks to help.
Where is the code who makes that little triangles appear in the "chart of accounts" view? May be I could imitate this code for my "product categories".