Add support for extract method to work inside expression bodied members
and unit tests.

- Fix #1853 update UnitTests to use resource strings
- Fix #1338 update EnC analyzers to use resource strings

Updates in this PR:
- Shared the same strings in FeaturesResources
- Added "Locked" annotation not to be localized

Fixes #29

Upgrades System.Collections.Immutable to 1.1.34-rc and
System.Reflection.Metadata to 1.0.19-rc.

When computing the distance between blocks, there was a missing case for LabeledStatement, causing UnreachableException. This PR fixes this issue.

Add simplifier annotation on using directives generated via the Add Using fix so that generated directives are already simplified (in the case where using is generated inside a namespace declaration) without the user having to simplify manually in a subsequent step.

Note: I also added the annotation inthe corresponding VB fix for parity. However, this should be a no-op for VB since VB only supports file-level namespace imports.

Fixes #1893

Don't trigger preselection when the user types space if the caret is
next to a word.

Fixes #1594

Replaced WithSemicolon/Semicolon to be WithSemicolonToken/SemicolonToken for consistency with other APIs

Fixes #1476

Responding to PR feedback, fixing some typos and simplifying some of the
boolean logic.

Fixes 1247

Handle the case where we are passed a type instead of a namespace (using
static).

Tie query nodes to their parent

Produce invisible / suggestion squiggles (which will in turn display Quick Info on mouse hover) for the hidden diagnostics that we report for 'Remove Unnecessary Usings' and 'Simplify Type Name'. The presence of Quick Info pane for such squiggles allows allows platform to display Light Bulb for the corresponding fixes. Per their current design platform can only display light bulb if Quick Info pane is present.

They don't contain the <completionlist> tag in their documentation

Enable editing VB methods containing lambdas and queries, except for methods containing Aggregate, Join and Group By clauses

Fix internal TFS bug 1130555 : Getting Parent of SyntaxNodeOrToken
does not need conversion to Node or Token.

When converting a SyntaxNodeOrToken to a Node or Token use IsNode or IsToken.

In this particular instance, we have introduced the check in
InlIneTemporaryCodeRefactoringProvider to prevent crash. We will still
have to find the scenario that triggered this situation.

This reverts commit b37052d0.

Offer to add imports\namespaces for extension methods that apply to
collection initializers.

Fixes #269