Set Cin7 Sales Rep on new customer accounts to account manager by default

When you are creating a customer account for Cin7 Core from your workspace, this currently sets the Cin7 Sales rep to be none by default, even if there is an account manager already assigned to the company. It is logical that the sales person of the account in Cin7 would be the same person who is marked as their account manager in their workspace. Setting this to the account manager that is set on the company by default would allow our customer to create a better experience when creating customer accounts as they would not need to check this against the company record.