[Enhancement] Allow pasting URL to Product Photo

[Salvoxia]

While populating Warracker with products I noticed that I basically all the time use a product photo from the vendor's homepage.
Currently, Warracker only allows you to choose a file for uploading from your local device. This forces me to manually download the product photo from the vendor's homepage, save it in a temporary location, then upload it to Wrracker and delete the temporary file later on.

My request is to allow the user to either upload a file or to paste a URL to an image file that Warracker automatically downloads for me. This would make the process of adding new products much more fluent.

Thanks!