nsxiv: get lowest date from metadata

.config/nsxiv/exec/image-info

@@ -18,6 +18,6 @@ filesize=$(du -Hh -- "$1" | cut -f 1)
 geometry="${2}x${3}"
 #TODO: imrpove for multiple date formats
 #currently just picks the first date that is not a profile or file date using exiftool (no one coherent standard for date in exif metadata is used)
-date_shot="$(exiftool -- "$1" | grep 'Date' | grep -vE '(Profile|File)' | head -n1 | cut -d: -f1 --complement)"
+date_shot="$(exiftool -- "$1" | grep 'Date' | grep -vE '(Profile|File)' | cut -d: -f1 --complement | sort | head -n1)"
 
 echo "${filesize}${s}${geometry}${s}${filename}${s}${date_shot}"