It would really ROCK if each screen where you have a choice, you can choose no or not to do it and escape it by using the keyboard, rahter than just clicking out of it using the mouse. Like the Buy/Sell window etc.
You currently can use the "escape' key to back out of stuff. However, devs I wonder if we could modify this and make it the X key. That just seems more logical for use on the keyboard and easier for fingers to get to also.