CMDB Workspace Related List create UI Action Button

[tomeczek1]

I have created a UI Action for one of the custom m2m related lists.
The UI Action is of client type. When I click the New button, a new form opens, but I need to pass some parameters in the query to limit the options in the reference fields. This works as expected in the Classic UI, but not in Workspace.

I discovered that there is a separate Workspace Related Action module where I can create a dedicated button for Workspace. I was able to create it and pass the parameters in the query, but the new form does not open as expected. I would like it to open within the breadcrumbs to make navigation easier. Instead, it reloads the entire browser window, and the breadcrumbs display as Home -> New Record, which is not ideal. I want to have HOME-> CMDB->Application Access-> New m2m table record 

Could you please advise on how to improve the client script, or should I create a Workspace UI Action button differently? 

Here is the classic UI Action script 

"

function redirect() {

    var url = new GlideURL('/u_m2m_user_application_access.do');

    url.addParam('sys_id', '-1');

    if (g_form.getTableName() == 'cmdb_ci_business_app') {

        // u_business_application field is used in refqual on u_application_service field

        // we don't use this field for any other purpose (and shouldn't)

        url.addParam('sysparm_query', 'u_business_application=' + g_form.getUniqueValue());

    }

    else {

        url.addParam('sysparm_query', 'u_application_service=' + g_form.getUniqueValue());

    }

    g_navigation.open(url.getURL());

}"

I want the same to be achieved in Wrokspace, here is the current sciprt, that works but open  a tab NOT in the breadcrumbs

"

function onClick() {

    var tableName = g_form.getTableName();

    var uniqueValue = g_form.getUniqueValue();

    var queryParam = (tableName === 'cmdb_ci_business_app') ? 'u_business_application=' : 'u_application_service=';

    var link =  "now/cmdb/home/sub/record/u_m2m_user_application_access/-1/params/query/" + queryParam + uniqueValue;

    var win = top.window.open(link, '_self');

}"

Can you please advise?