"Are You Sure You Want to Leave This Page" Dialogue when Leaving Unsaved Note

When editing, say, a note, (and without having 'saved' the note yet), I lose my note when leaving the page.


My feature request is to display one of those "Are you sure you want to leave this page?"-dialogues before leaving the page. 


Idea Created By Tristan Laurillard of Laurillard.com 

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