Job status in web UI should better reflect actual status in engine

[bertfrees]

For example:

• For jobs listed as "running" it should be checked whether they are actually still running. For instance if the engine was restarted in the middle of a job it's probably not running anymore when the engine comes back online. This can be very confusing. The job should probably say "Failed" or maybe "Cancelled" or something.
• Related: When a job is deleted in the web UI it shouldn't be removed from the list until it is actually gone in the engine: Don't delete the webui job if the engine job is not deleted #62

Also related: #61

[josteinaj]

The first issue where they have the state "running" permanently I believe to be an issue with the engine. I haven't looked into it for a while though.

[bertfrees]

See daisy/pipeline-framework#105.

[josteinaj]

I'm closing this one as all the issues mentioned have separate issues.