Filter for popover subscription form


I'm having great times customizing the Membership plugin functionalities to fit to my website workflow, the plugin structure is incredibly organized and the filters and actions are allowing me to extend it gracefully.

But I found a missing point: the popover_sendpayment_form.
The filters and actions are missing there (about line 7306 of the membershipadmin.php file), and the HTML is in the middle of the functions code (there is a file called popover_payment.form.php but it is empty).

I would like to customize how the HTML of that screen is rendered.
Are you planning a new release fixing that?

Thanks in advance.