Set "Assigned User" to Administrator by default on new Quotes using Quick Create

I am working on modifying the out of the box module, Quotes (renamed Estimates) so that all newly created quotes are assigned to Administrator by default no matter what user is logged in and creating quotes.

I have been able to follow the post: #22760 Change Default Assigned To so that when I create a new quote/estimate the assigned to field does auto populate with Administrator. But when I click on save, the assigned to field changes to whoever I’m logged in as (not administrator).

I was able to fix this issue by adding this line to AOS_Quotes.php in the custom/modules/AOS_Quotes directory: $assigned_user_id=$_POST[‘1’];
I added this line in the save function:

function save($check_notify = false)
{
global $sugar_config;

    if (empty($this->id) || $this->new_with_id
        || (isset($_POST['duplicateSave']) && $_POST['duplicateSave'] == 'true')) {
        if (isset($_POST['group_id'])) {
            unset($_POST['group_id']);
        }
        if (isset($_POST['product_id'])) {
            unset($_POST['product_id']);
        }
        if (isset($_POST['service_id'])) {
            unset($_POST['service_id']);
        }
		
		$assigned_user_id=$_POST['1'];

So now the assigned to user displays as administrator and saves as administrator when anyone other than administrator creates a new quote/estimate.

However, this only works when I go to the Quotes/Estimates module and click on create quote/estimate. It does not work if I go to the customer account and then the subpanel quote/estimate and click create (which I believe is quick create).

https://pasteboard.co/I3gwZAO.jpg

Thank you

Versions:
SuiteCRM 7.10.7
PHP 7.2
SQL Server 2014
Windows Server 2012 R2
Chrome 71.0.3578.98

The other thing I noticed is that the quick create button for Quotes loads a url like this: http://roofdini.biscayneroofing.com/index.php

but if I go to the Quotes/Estimates module and click on create, I get a link like this: http://roofdini.biscayneroofing.com/index.php?action=ajaxui#ajaxUILoc=index.php%3Fmodule%3DAOS_Quotes%26action%3DEditView%26return_module%3DAOS_Quotes%26return_action%3DDetailView

One is using AJAX and 1 id not. Is there a way to change the url for the quick create to use AJAX?