Add discount to quick quote

when can we please have the option to add discount to a quick quote?  I just lost out on $280 because I created a quote with a 10% rebook discount for a returning guest).  And before I could disable it, someone booked my property and nabbed that discount. Grrrrr!!!!  Of course there are no criteria I could have selected for “returning guest” to prevent this from happening. And I don’t like the fact that manually applying a discount ONLY gives me the option to discount on subtotal and not rent alone. Can we please get some fixes for these 2 things, like immediately?  

I agree! PLEASE make this an option!