Add Reference 'Extensions' is empty in new NET SDK projects

Create C# project targeting NET 4.6.1.
Invoke Add Reference
Go to Assemblies - Extensions

Observed: long list with MSXML/MSHTML

Create C# project in new .NET SDK format targeting net461
Invoke Add Reference
Go to Assemblies - Extensions

Observed: The list is empty

Expected: list propulated since it the same .NET 4.6.1 target.

Basically makes it impossible to add MSXML or MSHTML via UI.

_This issue has been moved from https://developercommunity.visualstudio.com/content/problem/135298/add-reference-extensions-is-empty-in-new-net-sdk-p.html
VSTS ticketId: 512696_
_These are the original issue comments:_

Mikhail Arkhipov [MSFT] on 10/20/2017, 11:54 AM (3 days ago):

Also, manually adding <Reference> tag to the project does not work either (build breaks still). Only direct referencing assembly via Browse... works.

_These are the original issue solutions:_
(no solutions)