Fix(l10n): Update translations from Transifex

apps/dashboard/l10n/cs.js

apps/dashboard/l10n/cs.json

apps/dashboard/l10n/de_DE.js

apps/dashboard/l10n/de_DE.json

apps/dashboard/l10n/en_GB.js

apps/dashboard/l10n/en_GB.json

apps/dashboard/l10n/sr.js

apps/dashboard/l10n/sr.json

apps/dashboard/l10n/zh_HK.js

apps/dashboard/l10n/zh_HK.json

apps/dashboard/l10n/zh_TW.js

apps/dashboard/l10n/zh_TW.json

apps/files/l10n/fr.js

apps/files/l10n/fr.json