Validation demo iteration, new screen and message updates

Validation Demo Updates

• New screen. Pre-validated, prevent errors screen example
• Update validation demo messages and no validation to form attributes
• Reduce the use of "Please" in validation messaging

Other fixes

• Make select overflow text truncate with an ellipsis (...)
• Add additional form attributes to the form card; method, post, novalidate, etc.
• Make the required asterisk hidden for screen readers in form components and remove the title attribute (until we can pass in a custom string for the value)