lock meeting

Recently while I was hosting a meeting my mouse bounced on the "Lock Meeting" in the participants sub menu.  This locked the meeting right near the start and many participants were not able to join. There was no indication or dialogue that the meeting was locked, until my boss called.

Seeing as the "Lock Meeting" item is at the bottom of the list, and it is critical to the operation of the meeting can a dialogue be added to confirm the change. 

Thank you