I've discovered a strange behavior. I've generated a list which I customized a lot among other things using a .js file which I added to the JSLink field of the web part.
I went to the list settings and save the list template using Save list as template and checked the "Include Content" box.
Is there any way to add the "imported" list as a web part including all properties?
PS: When I export the list as a web part, the list does not contain any content anymore. So this isn't an option either.