The mass_tagger extension behaves incorrectly if the id of an image is
the same as the ending of the id of another image.
Example:
Select image 143: var string == "143:"
Select image 113: var string == "143:113:"
Select image 43: var string == "1113:"
So either the wrong image will be tagged, or it will cause an error if
that image doesn't exist.
Modified Mass Tagger extension to make it so that instead of redirecting to post/list it reloads the page instead, unburdening the user from a click on Back and manually reloading.
