python – How to add a tree view/ form view symbol next to its header in Odoo V13

I’m migrating the code from V7 to V13, i see the symbol present in V7 is not shown in V13 while migrating. Is this by default or we need to add it from the custom widget.
For eg.,

Image From V7

As per the image in the right corner i see there is a list view and form view symbol.

How can we see the same in V13? I have seen few documents but couldn’t figure it out.