Filtering using upper node in tree structure

[amutaher]

I think there is a problem with a tree structure in erpnext for example:
if I have Upper Item Group called A under this group I have three children A1, A2, A3
in searching or filtering by the parent group “A” in items I need to show all items under A1, A2, A3
the same issue in the warehouse tree, department tree …etc tree

I think also parent node in a tree structure must be unselectable!

is there any solution for this issue?