Creating a MVC controller with CRUD views adds second connection string to appsettings.json

(No code for this, result of running `dotnet scaffold` interactively.

Go through to create controller & views: find.

But my `appsettings.json` has been modified with a new connection string referencing SQL Server Local DB (as created by the project wizard). But there is already a `DefaultConnection` connection string referenced by project startup.

Why did scaffolding add this setting that isn't used in a way that is inconsistent in its naming from the project wizard?

Reproduce the issue by running `dotnet scaffold` interactively to create a controller and CRUD views, then inspect the resulting `appsettings.json` alongside the existing `DefaultConnection` used by project startup. Trace why the SQL Server Local DB connection string is added and determine whether the duplicate setting and inconsistent naming should be changed.

Written by the indexing model from the issue text.