Change the default status to pending on replies

Most of the time when we reply to a ticket, we either need the customer to send us some more information on the issue (steps to reproduce the issue or login information), or just for him to confirm if the issue he/she reported got fixed properly; thus I never click on the Submit button, and always have to choose the arrow to Submit as Pending.

There's a keyboard shortcut ctrl+alt+p to do just that, but I find it strange that the default status on the lower right button of the screen is not modifiable.