Fixes broken borders in reports section MR widget

What does this MR do?

In this MR I added a fix https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22204 that will only work in EE with the security reports available and breaks CE.

This MR fixes CE only

before	after

The EE fix is: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/7970

What are the relevant issue numbers?

Closes #51386 (closed)

Does this MR meet the acceptance criteria?

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