[FEATURE] extra margin when only 2 windows

[Stefanomarton]

Hi there,

I use the layout with 3 nstack, like a centered master. It is very nice to be able to set the dimension of a window when is the only one in the workspace.

I was thinking about the fact that for large monitor like 21:9 or 32:9 would be cool to have a function like nstack-double_mfact for when there are 2 window so that the left and right space would be larger and the windows would be easier to see.

It is possibile to implement it?

Thanks for the awesome layout

Stefano

EDIT: add sketch for clarity