Improve accessibility (#4369)

* fix(compose): Use nav and remove redundant aria-label

* fix(tabs_tab): Use nav and add aria-label

* fix(app): Add aria-label for settings toggle button

* chore: Run yarn manage:translations

app/javascript/mastodon/locales/nl.json

@@ -17,7 +17,7 @@
   "account.unblock_domain": "{domain} niet meer negeren",
   "account.unfollow": "Ontvolgen",
   "account.unmute": "@{name} niet meer negeren",
-  "account.view_full_profile": "Volledig profiel tonen", 
+  "account.view_full_profile": "Volledig profiel tonen",
   "boost_modal.combo": "Je kunt {combo} klikken om dit de volgende keer over te slaan",
   "bundle_column_error.body": "Tijdens het laden van dit onderdeel is er iets fout gegaan.",
   "bundle_column_error.retry": "Opnieuw proberen",
@@ -34,7 +34,9 @@
   "column.notifications": "Meldingen",
   "column.public": "Globale tijdlijn",
   "column_back_button.label": "terug",
+  "column_header.hide_settings": "Hide settings",
   "column_header.pin": "Vastmaken",
+  "column_header.show_settings": "Show settings",
   "column_header.unpin": "Losmaken",
   "column_subheading.navigation": "Navigatie",
   "column_subheading.settings": "Instellingen",
@@ -147,12 +149,12 @@
   "privacy.unlisted.long": "Niet op openbare tijdlijnen tonen",
   "privacy.unlisted.short": "Minder openbaar",
   "reply_indicator.cancel": "Annuleren",
-  "report.heading": "Rapporteren",
   "report.placeholder": "Extra opmerkingen",
   "report.submit": "Verzenden",
   "report.target": "Rapporteren van",
   "search.placeholder": "Zoeken",
   "search_results.total": "{count, number} {count, plural, one {resultaat} other {resultaten}}",
+  "standalone.public_title": "A look inside...",
   "status.cannot_reblog": "Deze toot kan niet geboost worden",
   "status.delete": "Verwijderen",
   "status.favourite": "Favoriet",
@@ -168,6 +170,7 @@
   "status.report": "Rapporteer @{name}",
   "status.sensitive_toggle": "Klik om te zien",
   "status.sensitive_warning": "Gevoelige inhoud",
+  "status.share": "Share",
   "status.show_less": "Minder tonen",
   "status.show_more": "Meer tonen",
   "status.unmute_conversation": "Conversatie niet meer negeren",