vifm dir preview, vicmd

.config/vifm/vifmrc

@@ -18,6 +18,9 @@ map bg :!setbg %f &<CR>
 nmap <space> tj
 nmap q ZQ
 fileviewer *.html,*.css,*.py,*.c,*.h,*.sh,*.diff,*.tex highlight -O ansi %c
+fileview */ tree %c -L 1 --dirsfirst
+
+set vicmd=$EDITOR
 
 set syscalls