[Request]Adding the "Main screen first" view

[Immersion95]

Hi,

DeSmuME has this option that shows the active screen (instead of only Top or Bottom).

It would be great with the Hybrid view.

https://wiki.desmume.org/index.php?title=DeSmuME_Manual_for_the_Windows_port#View_.7C_LCDs_layout

Thanks a lot !