add expandable context to composer when replying to post (#2419)

* add expand replyTo text with animation

* add images, quote to replyTo

* support withmedia

* adjust layout

* add embed to all needed openComposer calls

* adjust gap

* organize imports

src/view/com/post-thread/PostThreadItem.tsx

@@ -214,6 +214,7 @@ let PostThreadItemLoaded = ({
           displayName: post.author.displayName,
           avatar: post.author.avatar,
         },
+        embed: post.embed,
       },
       onPost: onPostReply,
     })