Functionality added and all tests working.

Update correct use of permissions form.

app/templates/flash_messages.html

@@ -5,7 +5,7 @@
       {{ banner(
         message,
         'default' if ((category == 'default') or (category == 'default_with_tick')) else 'dangerous',
-        delete_button="Yes, delete" if 'delete' == category else None,
+        delete_button="Yes, {}".format(category) if category in ['delete', 'remove'] else None,
         with_tick=True if category == 'default_with_tick' else False
       )}}
     {% endfor %}