LibGUI: Replace uses of JsonObject::get_deprecated()/get_ptr()

Author: https://github.com/AtkinsSJ
Commit: 2fce19a451
Pull-request: https://github.com/SerenityOS/serenity/pull/17081
Reviewed-by: https://github.com/trflynn89 ✅

Userland/Libraries/LibGUI/JsonArrayModel.cpp

@@ -119,12 +119,14 @@ Variant JsonArrayModel::data(ModelIndex const& index, ModelRole role) const
 
     if (role == ModelRole::Display) {
         auto& json_field_name = field_spec.json_field_name;
-        auto data = object.get_deprecated(json_field_name);
+        auto data = object.get(json_field_name);
         if (field_spec.massage_for_display)
             return field_spec.massage_for_display(object);
-        if (data.is_number())
-            return data;
-        return object.get_deprecated(json_field_name).to_deprecated_string();
+        if (!data.has_value())
+            return "";
+        if (data->is_number())
+            return data.value();
+        return data->to_deprecated_string();
     }
 
     if (role == ModelRole::Sort) {