Fix bug in monitoring of the number of candidates

The current implementation of the n_candidates plots the number of candidates for every candidate instead of only once. This MR uses now a new algorithm to plot event variables. The monitoring of the number of candidates is explicitly added to the Topo lines.

Needs Rec!3555 (merged)

changed the description

added 1 commit

• a36a7f85 - Fixed formatting

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added RTA label

mentioned in merge request !2742 (merged)

mentioned in merge request Rec!3555 (merged)

marked this merge request as ready

Should be ready to test now

assigned to @bjashal

@nschulte @bldelane FYI. I added monitoring of the number of candidates to the topo lines.

added impactlow prioritymid labels

assigned to @gunther

mentioned in issue #653 (closed)

/ci-test

resolved all threads

@sstahl can you please solve the conflicts?

added 90 commits

• a36a7f85...ea840d57 - 87 commits from branch master
• 61cc27c5 - change monitpring
• 9108c7a3 - add correct n_candidates monitor to lines and explicitly to the topo
• 378d3c65 - Fixed formatting

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resolved all threads

unassigned @bjashal

added Monitoring bug fix labels

assigned to @sstahl