fix ordered list numeration for lists with more than one level of list (#1142)

lib/src/widgets/style_widgets/number_point.dart

@@ -30,7 +30,7 @@ class QuillNumberPoint extends StatelessWidget {
     var s = index.toString();
     int? level = 0;
     if (!attrs.containsKey(Attribute.indent.key) &&
-        !indentLevelCounts.containsKey(1)) {
+        indentLevelCounts.isEmpty) {
       indentLevelCounts.clear();
       return Container(
         alignment: AlignmentDirectional.topEnd,
@@ -41,7 +41,7 @@ class QuillNumberPoint extends StatelessWidget {
     }
     if (attrs.containsKey(Attribute.indent.key)) {
       level = attrs[Attribute.indent.key]!.value;
-    } else {
+    } else if (!indentLevelCounts.containsKey(0)) {
       // first level but is back from previous indent level
       // supposed to be "2."
       indentLevelCounts[0] = 1;