Questions threads appear to have the option to be 'unmarked' as a question, but this option doesn't save

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP2, Master
• Fix Version/s: 7.0.0 DXP FP8, 7.0.0 DXP SP2, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: Collaboration, Message Boards
• Labels:
  • liferay-digital-enterprise-70-sp2
  • liferay-fixpack-de-8-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 2
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/44784

Description:
LPS-68460 introduced a fix that set threads created in a Message Board Question Category to be marked as questions. However, this also created an appearance of the ability to set these threads to no longer be questions.

Steps to Reproduce:
1. Create Message Boards Category
2. Category Settings - Display Style = Question
3. Create Message Board thread in category
4. Edit the Message Board thread
5. Go to More Settings
6. Uncheck Mark as a Question and save.

Expected: The Message Thread no longer has its Mark as a Question checkbox as checked
Actual: The Message Thread still has its Mark as a Question checkbox as checked

Additional Testing:
Reproduced on master - 7017d59b609cbdc5932778a3ba372c29ff5f0c28