Hello,
The feature "Edit order status in listing" is an HIkaMarket feature, so we are talking about the vendor order listing, not the customer order listing which is provided by HikaShop.
Regarding the "waiting days for payment request", it means that a vendor cannot ask for the payment of an order before that period of days.
When he will ask for a payment, he will see the sum of orders older than the configured days.
I hope my explanations are clear enough.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.