Allow users to limit the numbers of times the IVR repeats before using call handling.

Currently, when using a multi-level IVR menu, e are forced to allow the base prompt to repeast three times before triggering a call exception when the caller does not press a button.

This should be updated to the account admins can pick a number from a drop-down. These days it is very common for IVR prompts to say "Or remain on the line adn someone will help you." This is often necessary for ADA compliance.