mellow down the initial required field errors (bug 910009)

### Replaced the validation error notices with a little red star to indicate ```required```. The borders are still red.

![screen shot 2013-09-12 at 4 00 19 pm](https://f.cloud.github.com/assets/674727/1134918/20558dca-1bff-11e3-973b-80be9f95b201.png)

### Invalid inputs with hints highlights the hints red.

![screen shot 2013-09-12 at 4 00 40 pm](https://f.cloud.github.com/assets/674727/1134920/2ef35bf0-1bff-11e3-958d-b64b8e4f1632.png)