Covigator

Changes

* Add a link to documentation in contextual menu
* Update the documentation for the pipeline and the knowledge base
* Change logos

Changes

* Upgrade to CoVigator pipeline v0.9.3 (https://github.com/TRON-Bioinformatics/covigator-ngs-pipeline/releases/tag/v0.9.3) from v0.7.0 provides:
* Phasing of clonal mutations. Mutations affecting the same amino acid are now reported together in a MNV and its effect its correctly calculated
* Run pangolin to determine SARS-CoV-2 lineages
* Variant allele frequencies are now computed with vafator https://github.com/TRON-Bioinformatics/vafator
* Integrate pangolin data and add its own tab
* Reorganise tabs
* Add counter for samples, oldest and most recent sample
* Separate tables for ENA and GISAID
* Separate low frequency mutations into its own table
* Implement a sequential downloader for ENA FASTQs as distributed downloader was causing trouble when scaling out

Changes

* Style improvements
* Added a navigation menu
* Added information of last update of each dataset
* Better resolution logos

Changes:

* Cleaner separation of ENA and GISAID with two different URLs and different sets of tabs

Changes:

* Replace `about` tab by `acknowledgements` tab

Minor changes

- Remove some outdated reference to GISAID data in the downloads tab
- Make links in help tab to open in a different tab


Bugifx

- Wrong count of countries
- Fix plotly version to avoid issue on line plot