#18302 - dojox/widget/toaster - Do not override existing element ID on IE

On IE, when creating a new Toaster from an element which already has an ID the ID is replaced by a random, unique one. 

This is undesirable since there's no way to further modify the toaster element via CSS by ID.

See [ticket](https://bugs.dojotoolkit.org/ticket/18302)
We try to avoid being overly clever with statements like this... I would either use an if statement or a conditional operator