checkboxTreeview: no highlighting row if selected

[hnas66]

I am using checkboxTreeview, in princible this works as expected but I have some issues in
highlighting the active row If I click on the row or use "selection_set".
if i do the same with Treeview it works fine.

in example file you can set tree_type = 1 # 0: Treeview, 1: CheckboxTreeview to test it.

tkinter-fucus-test.zip

any support is apriciated.

[rdbende]

Duplicate of #70