Quick evaluation in `.qll` files fails

[max-schaefer]

Describe the bug

Quick-evaluating an expression in a .qll file fails with 'The selected resource is not a CodeQL query file; It should have the extension ".ql".' It works in a .ql file.

To Reproduce
Steps to reproduce the behavior:

1. Select a JavaScript database
2. Open the JavaScript library Expr.qll from latest master on Semmle/ql (any other .qll file should work as well)
3. Try to quick-evaluate the predicate ExprOrType::getEnclosingStmt
4. Get an error saying 'The selected resource is not a CodeQL query file; It should have the extension ".ql".'

The above reproduction steps use JavaScript as an example, but the same happens in other languages.

Expected behavior
The expression should be evaluated.

Environment (please complete the following information):

• OS: Linux (Ubuntu 18.04.4)
• Version: CodeQL 1.1.0

Additional context
This problem seems to be new in CodeQL 1.1.0.

[jcreedcmu]

Ah, yes, I should have caught this in review. Fix incoming.

[jcreedcmu]

@max-schaefer we'll make a bugfix release soon but you can manually install the dev build of the extension in https://github.com/github/vscode-codeql/actions/runs/58361000 if you want.

[max-schaefer]

Great, thanks for fixing this so quickly! (For now I've worked around this by modifying the extension in situ.)