fix(vim): allow Command-T to open items in Dirvish windows
fix(vim): allow Command-T to open items in Dirvish windows

I had this old hack in there for the sake of netrw; just need to update
it for Dirvish.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent