Ban journal cancel entry and autopost at same time

This application will ban choosing cancel entry and autopost at same time in Accounting->journal, it will post a warning message.

Why this feature is useful? We need to prevent assigning a new invoice number for a created invoice (originally canceled). However, we need to keep the sequence of invoice numbers including the invoice originating from a canceled state. Assigning a new invoice number is done by the Autopost Created Moves enabled, hence by disabling this feature when the cancel entry is enabled, will keep the sequence of invoice number.