chore: wrap autocorrect popup in material widget (#2558)

lib/pangea/choreographer/widgets/igc/autocorrect_popup.dart

@@ -13,7 +13,9 @@ class AutocorrectPopup extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
-    return Container(
+    return Material(
+      type: MaterialType.transparency,
+      child: Container(
         padding: const EdgeInsets.all(8.0),
         decoration: BoxDecoration(
           color: theme.colorScheme.surface.withAlpha(200),
@@ -30,6 +32,7 @@ class AutocorrectPopup extends StatelessWidget {
             ),
           ],
         ),
+      ),
     );
   }
 }