[MlMt] Behavior upon deleting an open message

[Robert Brenstein]

On 09.10.2016 at 18:11 Uhr -0400 John D. Muccigrosso apparently wrote:
>
>Yes, if you don't notice when you delete something it's a problem. 
>Have you considered changing the delete command to something less 
>easy to do by mistake? (I also just noticed "Cancel deletion", but 
>I'm not sure what that does.)
>
>John

Delete action could ask for confirmation. This should be naturally 
configurable by the user.

RObert