You can rename them as described by [hugobox] back in 2018 by the code below, but I wonder if it's possible to rename it permanently while running, which includes the group name displayed in the Dashboard overview tab : .
Is that possible ?
$("p.nr-dashboard-cardtitle").each(function(){
if($(this).text().trim() == $scope.oldGroupName.trim()){
p = $(this);
p.text($scope.msg.payload);
$scope.oldGroupName = $scope.msg.payload
}
})