Editor incorrectly identifies comments in JSX

If you comment a line of JSX using `//` or a block using `/* ... */` it renders as a comment (greyed out) in the editor, but it is not treated as a comment by the framework. Moreover, if you use a keyboard shortcut (ex: `Command+/` on macOS) to comment out a selection or current line, the editor will insert `//` which again does not make a valid comment.

See screenshot where a line 16 appears commented out but isn't actually.

Expected: Apparently comments in JSX need to be delineated with `{/* ... */}` and anything else should not be rendered greyed out.


Start by reproducing the issue in the editor with JSX lines using //, /* ... */, and the Command+/ shortcut. Inspect the editor behavior for comment highlighting and shortcut insertion; done means only {/* ... */} is treated as a JSX comment and the shortcut produces valid JSX comments.

Written by the indexing model from the issue text.