Dashboard autosaving changes without clicking on the Done button

Any changes on the dashboard are being saved without clicking on the done button
Message below: "You are currently editing your dashboard. Changes will be saved automatically"

Steps

Add a gadget or make some changes to the dashboard. A message pops up "You are currently editing your dashboard. Changes will be saved automatically" and the changes are saved

Current behaviour

The changes are autosaved and we can't undo them. We have to manually move them back.

Wanted behaviour

1. Until user click on Done button, it should not save the changes while editing the dashboards.
2. If user tries to leave the page with edits, user should be prompted that unsaved changes will be lost.