I have a button on my main page that opens up a new window. It is generated using jsgrid and this is the function that is called when the button is clicked:

let diagnosticTime = item.DiagnosticTime;
let faultCodeDesc = item.FaultCodeDescription;
let diagnosticKey = item.DiagnosticKey;
let actionUrl = "@Html.Raw(Url.Action("Subwindow", "PopulationDetails", new {
            populationId = Model.Id,
            serialNo = Model.SerialNo,
            accountId = Model.AccountId,
            ownerId = Model.PSSRId,
            alertType = 1,
            url = HttpContext.Current.Request.Url.AbsoluteUri
        }))&faultDate=" + diagnosticTime + "&faultDesc=" + encodeURIComponent(faultCodeDesc) + "&diagnosticKey=" + diagnosticKey;

        window.open(actionUrl, "_blank", "width=1400, height=700");

        e.preventDefault();
        e.stopPropagation();

The relevant parts are: Url.Action("Subwindow", "PopulationDetails" which calls a controller and this: window.open(actionUrl, "_blank", "width=1400, height=700"); which open up the new window. The problem I have, is that the url of the new window is (localhost)/umbraco/Surface/PopulationDetails/Subwindow, but I need it to be (localhost)/portal/condition-monitoring/population-details-subwindow. How can I control that? Do I manually change the url or is there a better way? Here's the controller that returns the view for the new window:

public ActionResult Subwindow(
Guid populationId,
string serialNo,
Guid accountId,
string diagnosticKey,
string ownerId,
DateTime faultDate,
string faultDesc,
int alertType,
string url,
string sosStatus = "") {


int sosAlertPriority = 0;
if (sosStatus != ""){
    switch (sosStatus){
        case "AR":
            sosAlertPriority = 3;
            break;
        case "MC":
            sosAlertPriority = 2;
            break;
        case "NAR":
            sosAlertPriority = 1; 
            break;
    }
} ...

...
var model = new CmAlertViewModel
{
    Population = populationId,
    SerialNo = serialNo,
    AccountId = accountId,
    AlertName = alertName,
    AlertPriority = alertPriority,
    OwnerId = Guid.Parse(ownerId),
    FaultDate = faultDate,      
    FaultDescription = faultDesc,
    PortalURL = url,
    AlertType = alertType
};
return View("~/Views/PopulationDetailsSubwindow.cshtml", model);}

Also, I checked the content of the PortalURL when the new window is opening using a debugger and the url is correct (the one I want the new window to open into)