Fixes #43400

Now that the old code is dead, we don't need to qualify things anymore.

* Fix for typing semicolon inside comments in an argument list

* Change to previously existing method

* Fix

* Fix for 34983

* Cleanup, fix For statements

* Add more tests

* Respond to feedback

* Fix spelling

* Don't complete when multiple chars selected

* Undo change to pos return value

Don't complete statement on element access expression unless caret is inside bracketed argument list (#34706)

* Fixes #34666

* Update CompleteStatementCommandHandler.cs

* Fixes #34176

* Fix test name

* Update tests - WIP

* Fix conditional

* Improve conditional

* add tests and check for caret before string

Complete statement: special handling needed for caret at end of line, outside of delimiters (#33883)

* Fixes 33851

* Add test

* Fix comment

* Enable OOP features by default.

* Removing unused function.

* conflicts