Made blink effect on thread update more soft

boards/static/js/thread_update.js

@@ -31,11 +31,10 b' var unreadPosts = 0'
 
 function blink(node) {
     var blinkCount = 2;
-    var blinkDelay = 250;
 
     var nodeToAnimate = node;
     for (var i = 0; i < blinkCount; i++) {
-        nodeToAnimate = nodeToAnimate.fadeOut(blinkDelay).fadeIn(blinkDelay);
+        nodeToAnimate = nodeToAnimate.fadeTo('fast', 0.5).fadeTo('fast', 1.0);
     }
 }