API: added dashboardId and slug in response after import (#19692)

pkg/plugins/dashboard_importer.go

@@ -97,6 +97,8 @@ func ImportDashboard(cmd *ImportDashboardCommand) error {
 		ImportedUrl:      savedDash.GetUrl(),
 		ImportedRevision: dashboard.Data.Get("revision").MustInt64(1),
 		Imported:         true,
+		DashboardId:      savedDash.Id,
+		Slug:             savedDash.Slug,
 	}
 
 	return nil