Merge pull request #6833 from euangoddard/master

[Modal] Tears down mutation observer on modal destruction

Author: jlukic

src/definitions/modules/modal.js

@@ -138,6 +138,9 @@ $.fn.modal = function(parameters) {
         },
 
         destroy: function() {
+          if (observer) {
+            observer.disconnect();
+          }
           module.verbose('Destroying previous modal');
           $module
             .removeData(moduleNamespace)