Resolve WIP button disappeared from WIP merge requests
### Summary
With a merge request with a title prefixed with `WIP:`, the button to resolve the WIP status no longer shows up to let you remove the WIP state in one click on the merge request.
### Steps to reproduce
1. Create a merge request of a project with `WIP:` prefix in the title
### Example Project
This project's merge request exhibits the behavior for me: https://gitlab.com/osslugaru/lugaru/merge_requests/27
### What is the current *bug* behavior?
The `Resolve WIP status` button is missing from the UI to let you resolve the status in one click.
### What is the expected *correct* behavior?
The `Resolve WIP status` button should exist and let you resolve the status in one click.
### Output of checks
This bug happens on GitLab.com.
issue