ViSR: RunPlan button loading does not reset after a bad response

[EmsArnold]

Before and after submitAndRunTask(taskRequest), the loading state of the button should be set:

...
        setLoading(true);
        await submitAndRunTask(taskRequest);
        setLoading(false);
...

Recent experiences with further downstream services being broken has created a situation where the response returned is 500 after a timeout period. After the response has been returned, the loading state should again be set to false but currently is not.

[douglaswinter]

I would imagine the solution for this comes from a glazed subscription, so that the button and any widget that is interested can always reflect the server state