Merge pull request
#3732 from minrk/slow-save-on-close...
Merge pull request
#3732 from minrk/slow-save-on-close
add delay to autosave in beforeunload
allows forceful 'discard changes' by reloading the page and dismissing the warning.
The timer doesn't start until after the dialog is dismissed, so if you decide to nav away without saving changes, the changes will actually not be saved.
