cubicweb #3526466 treeview is broken [validation pending]

Clicking on the second level in the tree does not produce anything.

This can be reproduced on an instance of the company cube (with a company entity and at least two nested subsidiaries). Plain vid=treeview does not work, but vid=companytree works.

done in3.18.3
load left0.000
closed by#39b46b0b01e4 [web/data] fix treeview regression (closes #3526466)
patch[web/data] fix treeview regression (closes #3526466) [applied]