EXTREMELY FRUSTRATING NEW THEMES :(

Hi,

I have just tried working with the latest themes specifically with the "Fixer" one. While editing the page and the text content, the, when i press delete (on mac) sometimes it removes the content for me to edit and other times it goes back i.e. back button and it re-sets all the work and changes i have made without auto-saving! Can you please add a feature so that it either ask's "Are you sure you want to leave this page?" or an Auto save feature that way you don't loose all the changes each time.

Themes seem like a good idea but still a little fiddly

Tom