I was just finishing up typing a long, long, long, long, LONG blog, and suddenly my finger slipped and I hit the backspace key, taking me away from the page. When I went back, my blog was GONE. I am so frustrated!

I know we've asked before but is there any way we could get a button to save a draft of our blogs? We could click it from time to time and then if we accidentally navigate away from the page, our work wouldn't disappear. Kind of like the Blogger interface below?
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Blogger also has a pop-up for when you leave a page without saving. Something like this would prevent a LOT of mistakes.
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It would be really, really helpful!