Pass default config into Base dough component
TabSelector - only collapse on resize if config set
Merge pull request #159 from moneyadviceservice/tab-selector

Tab selector - only collapse at small viewports if config supplied
Update TabSelector.md

Added the definition to the component and source link. The definitions potentially come from different sources.
Change base paragraph size to be 16px and 18px in .editorial content
Simplify p  statement scss