Stop Cin7 Omni Quote Line description going into notes if there is no change

Currently, we pass through the Quote Line description into the Cin7 Omni notes field to preserve any changes you might have made to this field in the CRM. Although, if you don't make any changes this is just duplicate data and can cause styling issues if you output both the notes and product description on invoices.

We should only pass through the description to notes if it is not the same as the Product Description (ie no changes were made). Or add a system option to allow customers to control this as it causes manual work on Cin7 side to avoid outputting this data twice.