refactor breadcrumbs
merged article refactor in and resolved conflicts
go with the functional style
merged in master, formatted code
lowercase links and tidy pre pull-request issues
remove extraneous match case
fixed merge conflicts in content
remove redundant class names from templates
don't lowercase tag links
remove extraneous class to fix align
Merge pull request #4363 from guardian/seo-breadcrumbs-refactor

Seo breadcrumbs refactor
fix merge problem
Merge pull request #4387 from guardian/facia-front-container-override

fix merge problem
Merge remote-tracking branch 'origin/master' into facia-tool-config
Change from section to navSection