Fixed Web IDE live preview not hot reloading

What does this MR do?

Fixes the Web IDE live preview not reloading. This is supported by the CodeSandbox library but there was some code of ours that was stopping this from intermittently.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/50231

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides