Implement RestrictedInternalsVisibleToAttribute

Expose a CodeAction API for groups of nested code actions

🧹 Remove IInProcessAnalyzer

🧹 Remove unnecessary locking from GetOrComputeDescriptors

Fix MEF usage in Navigate To test code

IDE benchmarks

🧹 Remove the use of asynchronous APIs in analyzer

🧹 Fix layering issues with embedded languages interfaces

Merge master to release/dev16.3-preview1

* Update publish data for 16.2-preview3 snap

* Update PublishData.json

Pass arguments to StreamJsonRpc as arrays

🐛 Fix incorrect caching of XML documentation comments with/without expandIncludes

Handle missing private metadata from reference assemblies

Avoid captures in SqlConnection.FlushSpecificWritesAsync

* Use ref locals to simplify code flow
* Fix VB code layout

Some reference assemblies omit information about private fields. To
avoid treating structures in these assemblies as immutable, we only
consider types immutable if they contain information about one or more
private fields.

This is a workaround for issues like dotnet/standard#678.

Add missing editor configuration properties

A build error is also reported for the lack of an appropriate constructor.

IsCompletionActive returns false when no text view is active

Works around microsoft/vs-streamjsonrpc#272

Simplify representation of AttributeLists/Modifiers on all MemberDecls.

Do not qualify instance member access within a constructor initializer

Avoid in-process captures in UpdateReferencesAync

Wait for project system before waiting for workspace

* Ctor refactoring

* Renames

* Renames

* Cleanup

* ProjectExternalErrorReporter ctor

* Refactoring

* Remove dependency on VS

* Aggregation improvements

* Use ordinal comparer for project names

* Construct ProjectExternalErrorReporter lazily

* Fix off by one

* Fix issues

* Wip

* Update more pages

* Formatting

* Respond to feedback

* Add spacing to Formatting General page

* Get SVsSolution service instead of IVsSolution

* Use the correct GetService overload