Initial sketch of the 'Replace Method(s) with Property' refactoring

Conflicts:
	src/Workspaces/CSharp/Portable/LanguageServices/CSharpTypeInferenceService.TypeInferrer.cs

Remove AbstractCompletionProvider in favor of CompletionListProvider

Fix space formatting of exception filter.

Fix reference directive completion for loose .csx files

If given a partially constructed type, call Construct() on its Constr…
Fixes #5126

Add missing 'Fact' attribute to unit test

Conflicts:
	src/Features/Core/Portable/FeaturesResources.resx

Improve the GenerateType code-actions menu experience.

Conflicts:
	src/Features/Core/Portable/FeaturesResources.resx

Make IDE analyzer tests fail if the analyzer threw an exception

Improve spell checking algorithm.  Extract common core so we can spell check C# as well

Enabling tests for 3593 and 3746

also add missing tests around the auto-property analyzer when a getter has
no body

e.g., a C# getter body doesn't necessarily have Statements, and if it
does, it may have zero or more than one

Handle local promotion to long lived in stack spiller when local is type substituted

Fix cursor scroll on Home and End in interactive window

when generating sig help, use SymbolInfo if TypeInfo resolution fails

Add handling for initialization of multiple properties with [As New ...] initializer.

Improve quality of Watson crash dumps when MetadataDecoder.LookupTopLevelTypeDefSymbol throws in context of an Async execution.

Properly handle conditional access combined with conditional method.