sh: Prefer vimiv as image viewer for iv alias

Simply prefer vimiv over other potential image viewers installed.

sh/.config/sh/alias

@@ -93,7 +93,7 @@ if exist imv-folder; then
         fi
     }
 else
-    for cmd in imv nsxiv vimiv sxiv feh; do
+    for cmd in vimiv imv nsxiv sxiv feh; do
         # shellcheck disable=SC2139
         # since we *want* it defined at definition
         if exist "$cmd"; then alias iv="$cmd"; break; fi