CC-2031: Put extra 'Add this show' button at bottom of Add show box

-Done. Just need Vladimir to fix up the css.

public/js/airtime/schedule/add-show.js

@@ -181,7 +181,7 @@ function setAddShowEvents() {
             makeAddShowButton();
 		});
 
-	form.find("#add-show-submit")
+	form.find(".add-show-submit")
 		.click(function(event){
             event.preventDefault();