Fix GNU Screen focus on Neovim

Author: tpope

autoload/dispatch/screen.vim

@@ -25,7 +25,7 @@ function! dispatch#screen#spawn(command, request) abort
         \ . shellescape('exec ' . dispatch#isolate(a:request,
         \ ['STY', 'WINDOW'], dispatch#set_title(a:request), a:command))
   silent execute '!' . escape(command, '!#%')
-  if a:request.background || a:request.action !=# 'start' && !has('gui_running')
+  if (a:request.background || a:request.action !=# 'start') && !has('gui_running') && !has('nvim')
     silent !screen -X other
   endif
   return 1