PayPal Website Payment Pro (UK) Password

When setting up payment gateways, particularly this one - the password field is a plain text field rather than a password field, allowing other administrators of the store to see the PayPal password. Is there any reason this is the case, or any way of changing this to be a password field?

change the admin/view/template/payment/pp_pro.tpl file and change the type for the password input to type="password"