[Feature Request] Grid view for entities hierarchy widget

[devaskim]

As of Thingsboard 3.4 entities hierarchy widget uses tree view to display sub-nodes. It would be great to have grid view option something like Material Grid List.

Not sure such view would be useful for multi-level hierarchy but single level case lets to build some kind of gallery or set of cards and use screen space more effective in horizontal direction.

The code base of current implementation is not obvious for me to implement grid view by myself so I decided to create this feature request.