Renew Membership : Send Receipt is TRUE and hidden when by default. Postprocess sends receipt regardless of state of record_contribution checkbox.

Renewal form currently sets send_receipt checkbox = TRUE by default when form is loaded. Since this field is hidden by default, and we shouldn't be sending a receipt unless record_contribution is also true - this is problematic behavior.

Modify form setDefaults to set send_receipt = FALSE
Add jscript to set send_receipt = TRUE onClick of record_contribution (if record_contribution is TRUE)

(assigning directly to Yash since this is in same form as CRM-2642)