Prohibit members from edit topic title

[O9C4]

There is no option to ban members from topic titles editing.

AdminCP has only Content - Editing:

Can edit own content?

• Personal Conversations
• Status Updates
• Topics
• Videos

or   All / None

The content must not be locked.

If opt-out for Topics, there is no more chance to edit topic title as well as first message (post), but i need to limit only topic title editing for members.