Convert radios for P.Admin email branding (basic)

app/main/forms.py

@@ -1753,7 +1753,7 @@ class ServiceUpdateEmailBranding(StripWhitespaceForm):
         }
     )
     file = FileField_wtf('Upload a PNG logo', validators=[FileAllowed(['png'], 'PNG Images only!')])
-    brand_type = RadioField(
+    brand_type = GovukRadiosField(
         "Brand type",
         choices=[
             ('both', 'GOV.UK and branding'),

app/templates/views/email-branding/manage-branding.html

@@ -2,7 +2,6 @@
 {% from "components/file-upload.html" import file_upload %}
 {% from "components/page-header.html" import page_header %}
 {% from "components/page-footer.html" import page_footer %}
-{% from "components/radios.html" import radios %}
 {% from "components/form.html" import form_wrapper %}
 
 {% block service_page_title %}
@@ -31,7 +30,7 @@
           <div style='margin-top:15px;'>{{form.name}}</div>
           <div style='margin-top:15px;'>{{form.text}}</div>
           {{ form.colour }}
-          {{ radios(form.brand_type) }}
+          {{ form.brand_type }}
           {{ page_footer(
             'Save',
             button_name='operation',