Styles for the new Stack Template Picker
JS updates for the new Stack Template Picker
Shortcode-Creator Updates

These changes are for the new Stack Template picker in the shortcode generator
Stack Insert Button Fix

Don't show insert stack button if the user is making a new stack from a template and forgot to put in a title. This way, after it shows the "You need a title" error alert, they still dont have the option to click on the "create new Stack" button - which is useless for Stacktemplates - only useful for duplication or fresh blank stacks