Remove unused imports and changed and improved layout design and responsiveness in some components and fixed some bugs.

src/components/ExamEditor/Shared/ExerciseLabel.tsx

@@ -19,8 +19,8 @@ const label = (type: string, firstId: string, lastId: string) => {
 const ExerciseLabel: React.FC<Props> = ({type, firstId, lastId, prompt}) => {
     return (
         <div className="flex w-full justify-between items-center mr-4">
-            <span className="font-semibold">{label(type, firstId, lastId)}</span>
-            <div className="text-sm font-light italic">{previewLabel(prompt)}</div>
+            <span className="font-semibold ellipsis-2">{label(type, firstId, lastId)}</span>
+            <div className="text-sm font-light italic ellipsis-2">{previewLabel(prompt)}</div>
         </div>
     );
 }