Add UI translations

[yatil]

There is a new fragment of language to translate:

wai-website-data/translations.yml

Line 746 in 8b3aa08

# ADDED 2019-07-09

Thanks

[yatil]

Update: These are now open for translation ASAP:

wai-website-data/translations.yml

Lines 746 to 773 in d1bb8e6

	# ADDED 2019-07-09
	- en: 'in' # for "in [resource name]" such as under the h1 of https://www.w3.org/WAI/people-use-web/user-stories/
	de: 'in'
	fr: 'dans'
	# ADDED 2019-08-19
	- en: 'Expand All Sections' # for expand-collapse toggle buttons such as under the Page Contents at https://www.w3.org/WAI/people-use-web/user-stories/
	de: 'Alle Abschnitte aufklappen'
	javascript: true
	- en: 'Collapse All Sections' # for expand-collapse toggle buttons
	de: 'Alle Abschnitte zuklappen'
	javascript: true
	# Added 2019-11-08
	# Links to footnotes and back from footnotes to the text
	- en: 'to footnote'
	javascript: true
	- en: 'back to footnote'
	javascript: true
	- en: 'in text'
	javascript: true