TinyMCE placeholders not being reverted to shortcode format before save to DB

[jonom]

As @tomstgeorge noted in #45, this commit has caused a breaking regression

just made this edit to shortcodable.js and it does fix the 'edit HTML source not saving' issue but breaks the saving of the inserted shortcode dataobject.
Now when I publish the page the embeded shortocde dataobject shows on the frontend as an image i.e. they are no longer being converted into shortcodes on save.
When I look in the database they are stored as the image and not being saved as e.g [myObject id="2"]

[sheadawson]

Yes this is not cool, I don't have time to look at it at the moment but can merge right away if anyone submits a fix