review: weekly_presentation_background

[thibautjombart]

We need a review for the weekly_presentation_background report. There is a lot of code duplicated from other reports which needs to be removed; quite possibly, keep only the text automatically generated.

Quick links to:

golden rules for writing reports: https://github.com/reconhub/guides/raw/master/golden_rules.html.zip

guide to review:
https://github.com/reconhub/report_factories_templates#revewing-changes

[thibautjombart]

@nsbatra flagging you as a representative for HQ ;) This report has a lot that needs removing, essentially all parts that already exist somewhere else. I suspect only the automatically generated text will remain.