Do not redownload the url-image

[Mannshoch]

Description
If an URL is the base of a receip image and you edit it later. On save the Url try to redownload. If the image does not exist an error appear and you could not procceed.

Reproduction
Steps to reproduce the behavior:

1. Go to a receip
2. Click on edit something and save
3. See error

Expected behavior
No redownload of the image if the URL not changed.

Actual behavior
If an URL is the base of a receip image and you edit it later. On save the Url try to redownload. If the image does not exist an error appear and you could not procceed.

Browser
Firefox

Versions
Nextcloud server version: 28.0.4
Cookbook version: 0.11.0

[christianlupus]

@seyfeb with the upcoming changes in the frontend and the new class structure in the JS code, how is the URL of the image handled? Is it just kept as it is? I just want to avoid conflicts with the fix for this issue.