Switch back to the grading form after requesting improvements

view/src/main/java/se/su/dsv/scipro/finalseminar/SeminarOppositionPanel.java

@@ -372,6 +372,9 @@ public class SeminarOppositionPanel extends Panel {
                     new ImprovementFeedback(getModelObject().getUser().getFullName(), localDeadline)
                 )
             );
+
+            requestImprovementsForm.setVisible(false);
+            gradeForm.setVisible(true);
         }
     }
 }