fix hovered tab button background color
uploader.__state didn't called at first pusher message
(if first message was last it didn't called at all)
Merge branch 'master' into multiupload

* master:
  fix hovered tab button background color
Merge branch 'master' into multiupload

* master:
  uploader.__state didn't called at first pusher message (if first message was last it didn't called at all)