Use endpoint for chat history instead of websocket (#67)

* Change placeholder when chat is disabled

* Use the /chat endpoint for bulk chat history population instead of websocket. For #47

* Force LiveUI/seek bar during live to show. Closes #11.

* Change pulling chat history into app.js

* Force new messages to have visability = true

webroot/js/message.js

@@ -81,6 +81,7 @@ class MessagingInterface {
 		} else {
 			this.tagAppContainer.classList.add('desktop');
 		}
+
 	}
 
 	setWebsocket(socket) {