Improvements to error reporting - ENSWEB-2052

Merged Marek Szuba requested to merge github/fork/ens-ap5/master into master

Created by: ens-ap5

Description

Minor improvements to error reporting when attaching remote files

Use case

Mainly for use when attaching trackhubs and parsing their files. See JIRA ENSWEB-2052.

Benefits

Improved usability

Possible Drawbacks

None.

Testing

Tested in browser. No applicable unit tests.

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