How to manage the action settings of a proxy Form Container component?
I'm using AEM WCM Core Components - Core Form Container (v2). I have a proxy Form Container where I'm trying to change the fields displayed for the "Mail" Action Type. See the fields in the red box in the attached screenshot. Those fields appear to be defined and managed by the datasource at core/wcm/components/form/container/v1/datasource/actionsetting. However, I can't find where I can override that datasource nor can I find any documentation. I've looked at FormActionTypeSettingsDataSourceServlet, but that didn't provide any hints.
I want to hide the "From" field using sling:hideResource but still provide a default value from my proxy Form Container. How would I go about doing that? Also, my frontend is not sightly, it's Angular.

