home/vifm: use image-roll for images

home/progs/vifm/vifmrc

@@ -229,6 +229,8 @@ fileviewer {*.[1-8]},<text/troff> man ./%c | col -b
 
 " Images
 filextype {*.bmp,*.jpg,*.jpeg,*.png,*.gif,*.xpm},<image/*>
+        \ {View in image-roll}
+        \ image-roll %f,
         \ {View in sxiv}
         \ sxiv %f,
         \ {View in gpicview}