Leftovers from the previous commit

src/components/ExamEditor/Exercises/MatchSentences/ParagraphViewer.tsx

@@ -12,7 +12,7 @@ interface Props {
 
 const ReferenceViewer: React.FC<Props> = ({ showReference, selectedReference, options, setShowReference, headings = true}) => (
   <div
-    className={`fixed inset-y-0 right-0 w-96 bg-white shadow-lg transform transition-transform duration-300 ease-in-out ${showReference ? 'translate-x-0' : 'translate-x-full'}`}
+    className={`fixed inset-y-0 right-0 w-96 bg-white shadow-lg transform transition-transform duration-300 z-50 ease-in-out ${showReference ? 'translate-x-0' : 'translate-x-full'}`}
     >
     <div className="h-full flex flex-col">
       <div className="p-4 border-b bg-gray-50 flex justify-between items-center">