Pull request header is not shown when using the Pull request view decorator

Summary

When using the bitbucket.pullrequest.view decorator, the pull request header (merge button, reviewers and actions) are not included in the layout and disappear.

Steps to Reproduce

1. Create a plugin using the decorator
2. Create a pull request
3. Load the decorated page

Expected Results

The page looks like the other pull request pages.

Actual Results

The pull request header is missing.

Notes

Example usage: (bitbucket-example-plugin)