Category Tree Linked Entity - filter all descendant, not only direct child

[mixerito]

I have done some investigation in the code, and if I understand it correctly, the previous intention was about to work the way I asked for.
...

[mixerito]

I understand your points, but how can I use such filter in Reports ?

At least please tell me, how to create custom additional searchTypes....

[mixerito]

Existing example relationships in system are:
<CategoryEntity> -> <Subentity>

- ReportCategory -> Report
-...