Add back a method called by TypeScript to track async operations.

Portable Compiler Server

Fix issue with VB preprocesser keywords appearing in the completion list within incomplete preprocesser

Add expansion rule to add cast to lambda expression bodies

Attempt to get the InvalidOperationException in AsyncLazy to fire less often.

Merge fix

Enable determinism end-to-end tests and fix SourceFileResolver

Remove SymReader mock, use the real reader since we always have ISymUnmanagedReader3 now

Set DeployExtension=false in BuildAndTest.proj...

skip a flaky test

Show the threaded wait dialog when code actions are invoked, not deep in some BG thread.

This is a more appropriate place for the type.

Simplify the client build by moving to a root type with a desktop and
portable variation.  This allows us to share more infrastructure between
the layers.

There is no need to use PortableShim in CompilerServerLogger anymore.
This is only used on final EXE projects now where the types are fully
usable.