Came around a small idea, It will be good to display the No of Quotes sent to the Customer as it shows the Invoice Count, Accounts receivable, Withholding tax and receivable in a tabular column.
So can easily filter the Quotes of Specific Customer.
The behavior you see is because certain functions (those you listed) affect the customer’s subsidiary ledger under Accounts receivable. The same is not true for sales quotes, which have no financial impact and do not touch Accounts receivable. In fact, you can create a sales quote with no customer whatsoever.
You can filter quotes for a specific customer in the Sales Quotes tab. Just search for the customer’s name.