Fix reply button not responding on gists list page

Summary

The reply button on the gists list page is non-functional; clicking it produces no action.

Steps to Reproduce

1. Navigate to the gists list page.
2. Locate a gist with a reply button.
3. Click the reply button.

Expected Behaviour

Clicking the reply button should trigger the expected reply action (e.g., open a reply form or perform the reply operation).

Actual Behaviour

Nothing happens when the reply button is clicked.

Environment

Not provided.

Reported by retoor via DevPlace.