Help Center: ? should reopen the UI if minimized

[escapemanuele]

Context: #84385

When the Help center is minimized and then a user clicks the ?, make that action reopen the Help Center, instead of closing it entirely.

[github-actions]

OpenAI suggested the following labels for this issue:

• [Feature Group] Help Center: The issue specifically addresses functionality related to the Help Center interface.
• [Feature] Help Center: This label is relevant as the proposed change directly impacts the Help Center's behavior when minimized.