Finish up embed modal feature (#4759)

* Add embed button to dropdowns of in-timeline statuses

* yarn run manage:translations

app/javascript/mastodon/locales/zh-CN.json

@@ -63,6 +63,8 @@
   "confirmations.mute.message": "想好了，真的要静音 {name}?",
   "confirmations.unfollow.confirm": "取消关注",
   "confirmations.unfollow.message": "确定要取消关注 {name}吗?",
+  "embed.instructions": "Embed this status on your website by copying the code below.",
+  "embed.preview": "Here is what it will look like:",
   "emoji_button.activity": "活动",
   "emoji_button.flags": "旗帜",
   "emoji_button.food": "食物和饮料",
@@ -162,6 +164,7 @@
   "standalone.public_title": "A look inside...",
   "status.cannot_reblog": "没法转嘟这条嘟文啦……",
   "status.delete": "删除",
+  "status.embed": "Embed",
   "status.favourite": "赞",
   "status.load_more": "加载更多",
   "status.media_hidden": "隐藏媒体内容",