Regards...
The short answer is 'no' there is not a way to 'un-edit' an ad and return it to the way it was previously - and have it still be reviewed/approved
Basically any time you edit an ad you are effectively deleting it, and creating a new ad.
And, please note that any edited ad will need to be reviewed, regardless of how how small or inconsequential the edit might seem. (This is because you can literally change the entire meaning of a word or sentance by changing just one letter.)
The best way to handle this in the future is to create a whole new ad in the ad group - rather than edit an existing ad. Then, let both the new and the old ad run until you see that the new ad is approved and running to your satisfaction.
Then, and only then, delete the old ad.
AWA