Show task progress in visualizer workers tab.

[riga]

Description

This PR adds the task progress percentage as a bootstrap progress bar in a new column to the table of running tasks in the "Workers" tab:

The value is even updated when the message modal of the specific task is open (which already had the ability to update task messages and progress via polling).

I didn't include the new column in the actual "Task List" tab, because it is probably only important for currently running tasks.

Motivation and Context

When dealing with a couple long-running tasks, it is a nice feature to see the progress per task already in the worker tab.

Have you tested this? If so, how?

The behavior is rather static, and I couldn't find existing tests that check similar features. However, I verified that the automatic updating via the refreshInterval of the opened modal is working properly and handles also null values.

[dlstadther]

I've never dealt with the UI portion of Luigi. Do you have a colleague you can tag for review? Or perhaps a previous Luigi UI contributor?

I like the idea here.

[riga]

I actually contributed a few UI related PRs such as task messages, worker processes customization, scheduler → worker communication, etc, but I think avoiding self-review is the point here ;)

@yrath @bfis Could you maybe give it a try? I prepared some test tasks to run in this gist.

[yrath]

Sorry for the late reply. I've checked out the PR based on the gist, everything worked as expected and looks good to me.

[riga]

@yrath Thanks for testing!

[riga]

@dlstadther Is this ok for you or should I provide additional tests?

[dlstadther]

Fellow review and testing works for me here. I'll merge.