How can I shut off the confirmation prompt when I delete conversations in Messages in OS X? I receive a lot of messages on my MacBook Pro on a daily basis. Periodically throughout the day I need to delete multiple conversations in messages for clarity purposes. Each time I delete a conversation thread I receive the following prompt:



I have looked around in Messages preferences and I can not see any readily apparent option to disable the deletion confirmation pop-up dialog box. Is there any way to disable this dialog in Messsages or otherwise?
This is more of a workaround. If you enable the "Save history when conversations are closed" option under Preferences->Messages, you won't be prompted when deleting conversations.