LPS-36216 Integration Tests - implement testing deletions in BasePortletDataHandlerTestCase
LPS-36216 Integration Tests - implement testing deletions at import in BaseStagedModelDataHandlerTestCase
LPS-36216 SF
LPS-38681
LPS-38277 Page refreshes when portlet is deleted
LPS-38272 Site Pages' Add Page, Export and Import links are only clickable away from their centers
LPS-38629 Apply buttons do not disable in select structure field