[Feature Request] Provide edit option for headers under Map Terms

[avinashreddy07]

Is it possible to provide edit option for headers(Term / Mapped Term) under Map Terms.
Because, by proving the edit option, user can provide a custom name to Mapped_Term, so that user can use Mapped_Term in his further development.
I remember, that editing of headers of Mapped_Term, was possible on WKS.

[laurachiticariu]

To address this, we first need a design for #70

Blocked on #70