Sync Button per Notebook

My suggestion is to add a refresh button per notebook to sync, which may improve user experience of Zeppelin. In Zeppelin, currently we have a refresh button at the front page to sync notebooks to an external storage like HDFS. I found this function very essential especially to support multi-instance Zeppelin with a shared HDFS notebook storage (also with a load balancer). Since you should allow a user to access the same version of his/her notebooks at any instance. However in this kind of multi-user environment, if a user click the button, not only his/her notebooks but all others on that instance will be affected. In my opinion It may cause some lag or some inconveniences in using Zeppelin. So I thought it may get better if we have a button per notebook with which we can refresh only the specific notebook.

(I beg your understanding since my English is not perfect and I don't know exactly how Zeppelin works internally, please correct me if I'm wrong)