Fix: Popover instances are now destroyed when they are not visible.

Otherwise 100% CPU was used, because new popover instance was created on each mouseover event. (Redmine issue: #6253)

lib/hawat/blueprints/design/static/js/hawat-jquery.js

@@ -157,11 +157,15 @@ $(function() {
                     }
                 }
         });
+        ref.data('popper-instance', popper);
     });
     $('.popover-hover-container').on("mouseleave", ".popover-hover", function() {
         var ref = $(this);
         var popup = $($(this).attr("data-popover-content"));
         popup.toggleClass("hidden static-popover");
+        var popper = ref.data('popper-instance');
+        popper.destroy();
+        ref.data('popper-instance', null);
     });
 
     // Callback for triggering re-render of NVD3 charts within the bootstrap tabs.