Add on close callback to tree-viewN

[mod80]

No description provided.

[itadapter]

@mod80
Look like the PR is DRAFT and I can not merge it

Looks good to me, let me know when its ready to merge

[mod80]

Added an on closed treeview callback - if exists on the node - is executed on close. This is being used to trigger the icon change to the open/closed variant. This is not an optimal solution but usable until I can take some time to deepdive into the treeview. Also, I've removed the img registry additions as they are not needed.

[itadapter]

as a brief reminder: You can add any icons you need, I would just add them into ZEUS-specific registry when you configure the image registry module, we pass an array of images, so you can pass ZEUS -specific images. The corporate hierarchy is a specific component in Zeus, so that where the images should go.