Fix not saving comment replies state on config change

Author: Stypox

app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentRepliesFragment.java

@@ -30,6 +30,7 @@
 import java.util.Queue;
 import java.util.function.Supplier;
 
+import icepick.State;
 import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.disposables.CompositeDisposable;
 
@@ -38,7 +39,8 @@ public final class CommentRepliesFragment
 
     public static final String TAG = CommentRepliesFragment.class.getSimpleName();
 
-    private CommentsInfoItem commentsInfoItem; // the comment to show replies of
+    @State
+    CommentsInfoItem commentsInfoItem; // the comment to show replies of
     private final CompositeDisposable disposables = new CompositeDisposable();