- Add copy button to the build logs

- Add support for timestamps in the build logs
- Other small UI improvements to the build view

static/js/directives/ui/copy-box.js

@@ -23,6 +23,9 @@ $.fn.clipboardCopy = function() {
   ZeroClipboard.on('aftercopy', function(e) {
     var container = e.target.parentNode.parentNode.parentNode;
     var message = $(container).find('.clipboard-copied-message')[0];
+    if (!message) {
+      return;
+    }
 
     // Resets the animation.
     var elem = message;