- Updated the a `VisualStudioWorkspaceAccessor` API in windows to enable the factory to retrieve a workspace given a text buffer.
- Added a way to add test services to `AdhocWorkspace` so we can test against services being retrieved from a `Workspace`. This will be much more common once we rely on services coming from `TextBuffer`s in our other tooling pieces.
- Added tests for the default workspace provider.
#1989
- Internalized the core implementation of `EditorSettingsManagerInternal`.
- Added a `VisualStudioWorkspaceAccessor` to enable the `Microsoft.VisualStudio.Editor.Razor` project to have access to the current workspace. Only added the Windows specific implementation of this type since the VS for mac implementation will require infrastructural work to make happen.
#1762