[Steam] Reduce time on opening reward covers

Unknown

Not sure if this has been mentioned elsewhere. When you get a reward (from token or after winning a match) and see the reward cover on your screen, you can click on it to reveal the reward. If you do, there's an animation that takes 1-2 seconds before the reward is revealed. You can press the spacebar instead of clicking on the reward cover to skip that animation. Helps to speed things up when opening multiple rewards. Also, once the reward is revealed, you press click Esc key to proceed.