"Disabled" checkboxes always pass false to backend regardless of being selected or not

• Type: Regression 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, 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: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/44183

Description:
This is one use case. There are others as well.
When a Message Boards category is set to "Question" display, threads created in it are not marked as questions.

Steps to Reproduce:

1. Add a Message Boards Category. Set the "Display Style" to "Question".
2. Navigate into the category and add a Thread. Notice under "More Settings" that the "Mark as a Question" checkbox is both disabled and selected.
3. Publish the thread.
4. Edit the thread.

Expected Behavior:
The "Mark as a Question" checkbox would still be selected. Replies to the thread would also have the "Mark as Answer" option.

Actual Behavior:
The "Mark as a Question" checkbox is not selected. Replies to the thread do not have a "Mark as Answer" option.

Reproduced on master - b55fcfe

Note: This was caused by LPS-44228