Add support for line breaks when displaying the service description in the frontend (#1004).

assets/js/frontend_book.js

@@ -745,7 +745,7 @@ window.FrontendBook = window.FrontendBook || {};
                 .appendTo($serviceDescription);
 
             $('<span/>', {
-                'text': service.description
+                'html': GeneralFunctions.escapeHtml(service.description).replaceAll('\n', '<br/>')
             })
                 .appendTo($serviceDescription);
         }