[MlMt] Is there a selection to search command?

[rail4you]

> *If implemented* then I think it should be done with a separate 
> “Focus” action which simply reduces the set of displayed messages 
> to those that are currently selected. After that, a search could be 
> performed.

Yes, I want to see a separate window or view(replaced current window) to 
show all the selected mails. I can only get such views using MailMate 
searching function, so I talked about some plans about searching.

Some softwares called this feature as "zoom in" and "zoom out".