Add silent reload of dashboard contents for fullscreen mode

[asdil12]

This will allow setting the get parameter interval to a value of seconds after which the index page is reloaded - but without loading indicator to always show results.
This is intended for dashboard usage.

[Martchus]

The commit message "Silent index autoreload of for dashboard use" is not nice. I would it rephrase as "Add silent reload of dashboard contents for fullscreen mode".

[okurz]

Would be nice but checks in OBS fail currently. We should only merge on green test results

[okurz]

Could you please use an approach that is compatible with 2b3885a as described in https://progress.opensuse.org/issues/17886 so that we do not have two refresh features?

[asdil12]

I don's see how that code could be reused in a valuable way. It would only create spaghetty code to mix index.js and fullscreen.js.
I had a talk to Marius and it would make more sence to rework the code from 2b3885a.
Also I made sure to use the same get parameter interval so that it will be transparent to the user.

[codecov]

Codecov Report

Merging #2684 into master will decrease coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2684      +/-   ##
==========================================
- Coverage   91.94%   91.83%   -0.11%     
==========================================
  Files         184      184              
  Lines       11589    11589              
==========================================
- Hits        10655    10643      -12     
- Misses        934      946      +12

Impacted Files	Coverage Δ
lib/OpenQA/Worker/Settings.pm	84.61% <0%> (-13.47%)	⬇️
lib/OpenQA/WebAPI/Controller/API/V1/Job.pm	87.69% <0%> (-1.54%)	⬇️

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[asdil12]

Rebased to current master to retrigger testsuite.

[Martchus]

To reuse or merge with existing auto-refresh code we needed to port the group overview to using AJAX first. Both auto-refresh approaches are just a few lines of code so I wouldn't overthink it.

[okurz]

sure, I agree. However I think the parameter is quite hidden. Can we add it to some help-text on the page?

[Martchus]

Yes, it is hidden. A better alternative would be adding a from element (like we already have for the fullscreen parameter) with a help-text. If it is good enough for @asdil12 as it is I wouldn't make that improvement mandatory for merging the PR.

Note that the fullscreen and interval parameters are so far also completely hidden on the group overview and the timeago rendering is broken on the group overview when setting the interval. So there's generally room for improvement.

[okurz]

fine. Martchus will cover the missing steps in the mentioned ticket.