unmodified documents remain open even after clicking "save All" option from close all dialogue.

Steps to reproduce:-->
1.Open an already published document.
2.Create another news document ,give the title & don't save it.
3..Now use close all tab to to close both documents.
4.second document gets listed in the close all dialogue.
5.Click on Save all to save the second document.
6.First document remains open

Expected:-->All the documents should be closed after clicking on save all option.