fix show/hide toggle text
fix aria-hidden on primary nav

updated how visibility is detected to make more robust
fix collapsable button and focus states
Merge branch 'master' of https://github.com/moneyadviceservice/frontend into bug/collapsable-accessibility
Merge pull request #201 from moneyadviceservice/bug/collapsable-accessibility

Bug/collapsable accessibility
Disable menu closing on focusout
Merge pull request #207 from moneyadviceservice/fix/banner

Disable menu closing on focusout
Fix undefined
Merge pull request #208 from moneyadviceservice/fix/broken-test

Fix undefined
Add promoted block to home page
Change placeholder image dimensions
Add promoted content type placeholder
Tweak home promoted style
Fix the alignment of the logo
Fix home contact typography
Fix home promoted content alignment
Change variable and add type placeholder
Fix home featured alignment
Further fix component alignment
Fix clearfix error