Great, but..

Hi man, i really love your plugin and it saves me always, but there is a problem, when you click on EDIT button to edit a value, and CANCEL the edit, it sends the request with empty string!

In line 102 and before sending the ajax call:
var mvalue = prompt(“Please provide a meta value.”);

I just surrounded the request with if (mvalue) condition, please apply that fix in the next version.

You also should not OVERWRITE similar meta keys!

and thank you very much!