DupRadar section in MultiQC report is duplicated for each sample

[drpatelh]

Description of bug

When using MultiQC v1.12 the custom content we use for dupRadar in nf-core/rnaseq seems to be duplicated once for each sample. This doesn't occur with v1.11 and the content is correctly rendered in the same plot / portion of the General Stats table.

File that triggers the error

You should be able to reproduce by downloading the files below, untarring and running multiqc . in the folder.

test.tar.gz

MultiQC Error log

There is no explicit error as it appears to be a rendering issue in the report.

[idot]

1634

id is overwritten even if its in metadata, pull request fixes that