http exception should come with text

[koppor]

The UX when a network error occurs, should be improved.

Currently:

1. Create a new library
2. Select "Springer" in "Web search"
3. Search for "test"
4. Result:

Expanding the error results in

Tasks

• Expected output:

  HTTP error 403 occurred when fetching from {URL}.
  

• The secrets should be removed from the URL. (Currently, the key is shown. See screenshot; the blurred part)

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Other place, where it works as expected (!)

1. I create an entry
2. Navigate to "General"
3. In the "File" field, "Download from URL"
   
4. I paste https://www.researchgate.net/profile/Joanna-Kosinska-3/publication/344415012_Autonomic_Management_Framework_for_Cloud-Native_Applications/links/5f73246a458515b7cf567d65/Autonomic-Management-Framework-for-Cloud-Native-Applications.pdf
5. Output
   

• If possible, also add the API key removal, here, too.

The log file of JabRef shows the full exception:

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• Another example https://www.researchgate.net/profile/Giuseppe-Muntoni-2/publication/344494377_Mining_the_Architecture_of_Microservice-Based_Applications_from_their_Kubernetes_Deployment/links/5f7c7b0b458515b7cf6a51bd/Mining-the-Architecture-of-Microservice-Based-Applications-from-their-Kubernetes-Deployment.pdf?origin=publication_detail
• Discourse discussion: https://discourse.jabref.org/t/a-network-error-when-i-use-the-jabref-to-manage-my-references/4274