Disable Site Manager being able to change the themes of a site.
A pretty simple question, but so far I haven't had any luck being able to go through with this.
The only option I've seen is deleting the current themes, apart from the one you wish to keep but this is more or a hack-job solution.
I wish for an Admin to be able to change and set the entire site theme through the admin tools, but disable site managers from doing so to individual sites through the site customization page.
Using Alfresco 5.2.