Updated the `oReceiver` variable type from `Receiver` to `ReceiverVM` in the `frmEnvelopeEditor` and `frmMain` classes to align with a view model pattern. Modified the `Controller.DeleteReceiver` method to use `oReceiver.Receiver`, reflecting the new structure. Additionally, created `BindingList` of `ReceiverVM` to support a more MVVM architecture.
BASE MODULE =========== This module is intended for often used constants and datastructures. Therefor it is important that this module does not have any dependencies on other modules!!