Merge branch '789-offer-up-and-down-arrow-keys-also-for-navigating-in-the-question-list' into 'staging'
Resolve "Offer up and down arrow keys also for navigating in the question list"
See merge request !847
Merge branch '762-implement-a-fallback-to-english-if-the-browser-is-set-to-a-language-other-than-english-or-german' into 'staging'
Resolve "Implement a fallback to English if the browser is set to a language other than English or German"
See merge request !837