Display process advanced settings when the process has started

closes #1410 (closed)

We don't have the chunks count on the process, but I guess you can see it in the graph anyway

changed milestone to %Arkindex 1.6.1

requested review from @babadie

assigned to @mlbonhomme

merged

mentioned in merge request backend!2315 (merged)

mentioned in issue #1433 (closed)