Don't reset time in link expander and hide time with css

client/css/style.css

@@ -868,6 +868,10 @@ button,
 	color: #f00;
 }
 
+#chat .msg.toggle .time {
+	visibility: hidden;
+}
+
 #chat .toggle-button {
 	background: #f5f5f5;
 	border-radius: 2px;

src/plugins/irc-events/link.js

@@ -34,7 +34,6 @@ module.exports = function(irc, network) {
 
 		var msg = new Msg({
 			type: Msg.Type.TOGGLE,
-			time: ""
 		});
 		chan.messages.push(msg);
 		client.emit("msg", {