Disabling Overview sections

Add a possibility for the user to specify which sections of Overviews are displayed by specifying false for the ones to hide in genesysConfig: Config:

// Embedded Genesys configuration
const genesysConfig = {
  apiUrl: 'https://api.sandbox.genesys-pgr.org', // Genesys API server
  ...
  overviews: {
   'cropName': false,
   'taxonomy.grinTaxonomySpecies.name': false
  }
}

The section keys can be identified in src/accession/AccessionOverviewSection.tsx.

By default all sections are enabled.