Finish up embed modal feature (#4759)

* Add embed button to dropdowns of in-timeline statuses

* yarn run manage:translations

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

@@ -63,6 +63,8 @@
   "confirmations.mute.message": "你確定要將{name}靜音嗎？",
   "confirmations.unfollow.confirm": "Unfollow",
   "confirmations.unfollow.message": "Are you sure you want to unfollow {name}?",
+  "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": "活動",
   "emoji_button.flags": "旗幟",
   "emoji_button.food": "飲飲食食",
@@ -162,6 +164,7 @@
   "standalone.public_title": "A look inside...",
   "status.cannot_reblog": "這篇文章無法被轉推",
   "status.delete": "刪除",
+  "status.embed": "Embed",
   "status.favourite": "喜歡",
   "status.load_more": "載入更多",
   "status.media_hidden": "隱藏媒體內容",