[MlMt] discrete graphics

[Thomas Roberts]

Just noticed this happening on my 2014 MBP, but MailMate triggers the 
use of discrete graphics. When I quit MM, my machine switches back to 
integrated graphics. It’s repeatable. Not sure what framework or API 
MM uses that would necessitate the higher power graphics, but thought I 
would bring it up. Couldn’t find anything in the list archives about 
it. Thanks!

-Tom