Implement ActionMenu and refactor article replies

[MrOrz]

• Extract ActionMenu (menu with vertical "⋯" button) from ReplyActions
  • We will be adding that to reply requests and article reply feedbacks, thus extracting them will be beneficial
  • Apperance adhere to https://www.figma.com/file/zpD45j8nqDB2XfA6m2QskO/Cofacts-website?node-id=1019%3A89
• Replace verbose props of ReplyAction to one single articleReply
  • Previously there is an insane prop drill of actionText, disabled & onAction props from CurrentReplies & reply/[id] all the way down to ReplyAction
  • However, all it needs to perform action is a article-reply instance.
  • Minor behavior change: after restoring a reply from "Deleted replies" dialog, the dialog will not close automatically if there are still other deleted replies. I think this behavior is OK for the users.
• Remove unused props from components like ArticleReply, DeletedItems
  • They are not used in codebase at all......

ActionMenu

[coveralls]

Coverage decreased (-0.06%) to 74.628% when pulling 4755649 on refactor-reply-action into d10987d on master.