Change Sort field's name for the image

Is there a way to change shown name in the Sort field as it shows me Source name of the image
I tried to edit HTML code like
Well, I can change the position of the field, so the field with appropriate name would be shown, but is there a way to just change the shown name as I wrote upper? Thanks

You can sort by any field. If you have a picture at the {{Front}} you can sort by Back, or any field you may created. Here is an example:

and the default sort by the picture field: