allow contracts to be returned for editing

contracts/forms.py

@@ -80,6 +80,7 @@ class ContractAdminForm(forms.ModelForm):
                         if choice_key in (
                             Contract.StatusTypes.APPROVED,
                             Contract.StatusTypes.REJECTED,
+                            Contract.StatusTypes.WORK_IN_PROGRESS
                         ):
                             allowed_choices.append(
                                 (