* Add a synced use enhanced color checkbox to C# and Basic advanced options.

* Use optionstore in DiagnosticWindow option pages

* Add option search keywords for enhanced color option

- Reverted FormatCommandHandler.FormatDocument
- Removed option search configuration for code cleanup

* remove usings when format document

* sort usings when format document

* add code fix

* hack fix for the issue with apply multiple changes.

* refactoring

* 3 changes

1. put open file editorconfig change tracking back
2. handle open file leaking when solution close with files opened case
3. don't share locks between editorconfig events and roslyn events

* skip the 'Remove unused variable' when format document

* changed code fix part to use "fix all" and only fixes P1 list rather than fix everything in the document. also not apply changes to buffer until everything is done rather than doing it per fix.

* made undo experience better

* add expression body as one of fix to offer

* add code fix options in format document settings

* add hidden box IsCodeCleanupConfiguredCheckBox to track if the user ever configured the code cleanup

* clean up

* fix some tests

* disable a test temporarily

* PR comments

* refactoring

* Revert "3 changes"

This reverts commit 7e0fd53f02a0e20d063440b3cce5569e51e71afc.

* PR comments

* PR comments

* renaming

* bug fixing

* PR comments

* refactoring

* refactoring

* refactoring

* refactoring

* Make ICodeCleanupService extend ILanguageService

* refactoring

* refactoring

* fix deadlock, call Format inside CodeCleanupService

* rename async methods

* PR comments

* move files under features

* PR comments

* PR comments

* Never Show this again will never show the code cleanup info bar for this user.

* rename

* use ImmutableArray

This shows our informational version in Help > About instead of a
useless ProductID GUID.

Fixes dotnet/roslyn#17038.

Implements #7064

This change includes:

- An analyzer and codefix for enforcing naming styles and fixing symbol names to comply with a chosen & configurable set of naming rules.
- A set of Enforcement Levels that can be applied to different naming rules.
- A mechanism for linking from a lightbulb preview to the option that caused the related diagnostic to be created (could be moved to a different PR or release)
- Moving of the "Formatting" options pages under the Code Style node.

..  Quick Launch bar

Some people found this confusing, and it's no longer accurate since we
format with parse errors now.

Fixes internal bug 1144194.