Replaced login slide down animation with shorter fade in and bounce

The admin login page had a total of 4 seconds of animation and delays, with about 3.5s before the page was useable. It was waiting 1 full second, and then running all animations serially. I've set it to 1) have no delay before animation begins, 2) animate the logo with a 1s bounceIn, 3) run animations in parallel, 4) .5s fadeIn for the inputs.

In total, this removes about 3 seconds of waiting before logging in.