i18n: Update Japanese translations (#10706)

* Update Japanese translations.

run yarn manage:translations

This commit includes translations by some users that were done at the transifex.

* Reduce translation text because it becomes two lines.

app/javascript/mastodon/locales/en.json

@@ -77,6 +77,7 @@
   "compose_form.poll.remove_option": "Remove this choice",
   "compose_form.publish": "Toot",
   "compose_form.publish_loud": "{publish}!",
+  "compose_form.sensitive.hide": "Mark media as sensitive",
   "compose_form.sensitive.marked": "Media is marked as sensitive",
   "compose_form.sensitive.unmarked": "Media is not marked as sensitive",
   "compose_form.spoiler.marked": "Text is hidden behind warning",
@@ -209,6 +210,7 @@
   "lightbox.close": "Close",
   "lightbox.next": "Next",
   "lightbox.previous": "Previous",
+  "lightbox.view_context": "View context",
   "lists.account.add": "Add to list",
   "lists.account.remove": "Remove from list",
   "lists.delete": "Delete list",
@@ -340,7 +342,6 @@
   "status.reply": "Reply",
   "status.replyAll": "Reply to thread",
   "status.report": "Report @{name}",
-  "status.sensitive_toggle": "Click to view",
   "status.sensitive_warning": "Sensitive content",
   "status.share": "Share",
   "status.show_less": "Show less",