Not seeing refactorings try to intelligently expand based on the current selection

[mjbvz]

TypeScript Version: 4.2.0-dev.20201109

Search Terms:

• refactor / refactoring
• discoverability

Repro
From #37895

1. With a JS file:

const a = document.createElement('a')

2. Select ent.createElement('a')
3. Explicitly trigger refactorings (you can use the right click menu in VS Code to do this)

Expected
Based on the discussions in #37895, I'd expect this to return an extract function refactoring that extracts the entire document.createElement('a') expression to a function

Actual
No such refactoring returned. I confirmed that we tell TS that this refactoring was explicitly requested:

[Trace  - 03:33:16.867] <semantic> Sending request: getApplicableRefactors (92). Response expected: yes. Current queue length: 0
Arguments: {
    "file": "/Users/matb/projects/san/b.js",
    "startLine": 1,
    "startOffset": 12,
    "endLine": 1,
    "endOffset": 38,
    "triggerReason": "invoked"
}

/cc @jessetrinity