Better error handling in Export History UI

[davelopez]

Describe the bug When there is a problem accessing the history in the Export History interface (invalid ID, restricted access, etc.) the UI renders the error message but also a spinner loading the history name and the rest of the UI making it confusing.

Galaxy Version and/or server at which you observed the bug Galaxy Version: 24.0 Commit: (run git rev-parse HEAD if you run this Galaxy server)

Browser and Operating System Operating System: Windows, Linux, macOS Browser: Firefox, Chrome, Chrome-based, Safari

To Reproduce Steps to reproduce the behavior:

1. Go to http://127.0.0.1:8081/histories/nonsense/export
2. Observe the error

Expected behavior The error renders and the rest of the UI doesn't.

Screenshots