[MlMt] Preview again

[John D. Muccigrosso]

On 7 Sep 2016, at 10:40, Robert Brenstein wrote:

> May be this command should refer to showing msg content pane. After 
> all, that pane is also shown when no message is selected in the list. 
> An alternative could be to define another layout that can be selected 
> as an alternative to the three pane layout: a two pane layout. A three 
> pane layout without the msg content pane is a three pane layout by 
> name only after all.

Yes, I like this 2-pane or 3-pane idea.

John