Store Internal Link Click on main domain level in WebSDK

Add the ability to store Internal Link Click information on main domain level.
AppMeasurement Activity map uses a cookie(s_sq) set on main domain level to store information about the click from previous page, page name, link, region. The corresponding feature with WebSDK, Internal Link Click, only offers to set this information in either local storage or session storage, both stores data on subdomain level. Result is that Internal Link Click tracking doesn't work across subdomains. If your site holds e.g. www.website.com and secure.website.com Internal Link Click tracking won't work across.
Would be ideal to be able to use a cookie for Internal Link Click tracking with WebSDK too. Sending Internal Link Clicks immeadiately and not use a grouping would duplicate the server calls and not an option.