Choose which functions of payment processing a sub-admins is enabled access to

At this time, the only way to remove their ability to post a manual credit would be to remove the checkmark from "can process payments", but this will also remove their ability to use the preload credit option and (more obviously) process payments. The settings for that option are currently not separated,

Instead of 1 blanket option setting for "processing payments", I can choose if the system user is allowed to "pre-load manual credit", "post manual credit", etc.