tidy up some longs related stuff

longs/forms.py

@@ -51,13 +51,16 @@ class LongAnswerForm(ModelForm):
 class MarkLongQuestionSingleForm(ModelForm):
     class Meta:
         model = UserAnswer
-        fields = ["score"]
+        fields = ["score", "candidate_feedback"]
 
+        widgets = {
+            "candidate_feedback": Textarea(attrs={"rows": 3}),
+        }
 
 class MarkLongQuestionDoubleForm(ModelForm):
     class Meta:
         model = AnswerMarks
-        fields = ["score", "mark_reason", "candidate_feedback"]
+        fields = ["score", "mark_reason"]
 
 
 class ExaminationForm(ModelForm):