Use helper function to render settings page

- use front end for validation testing
- change "form" to "application_form"

templates/portfolios/applications/settings.html

@@ -16,13 +16,13 @@
     <div class="panel">
       <div class="panel__content">
 
-        {{ form.csrf_token }}
+        {{ application_form.csrf_token }}
         <p>
           {{ "fragments.edit_application_form.explain" | translate }}
         </p>
         <div class="form-row">
           <div class="form-col form-col--two-thirds">
-            {{ TextInput(form.name) }}
+            {{ TextInput(application_form.name) }}
           </div>
           <div class="form-col form-col--third">
             {% if user_can(permissions.DELETE_APPLICATION) %}
@@ -45,7 +45,7 @@
         </div>
         <div class="form-row">
           <div class="form-col form-col--two-thirds">
-            {{ TextInput(form.description, paragraph=True) }}
+            {{ TextInput(application_form.description, paragraph=True) }}
           </div>
           <div class="form-col form-col--third">
             &nbsp;
@@ -96,7 +96,7 @@
           modal_id=delete_modal_environment_id,
           delete_text=('portfolios.applications.delete.button' | translate),
           delete_action= url_for('applications.delete', application_id=application.id),
-          form=form
+          form=application_form
         )
       }}
     {% endcall %}