Add email field type

[mikeselander]

Or, make validation of email possible with an attribute on the text field. Open to opinions on this one.

[barryceelen]

A field with type="email" would show an appropriate keyboard on devices with an on-screen keyboard. Optional validation via a novalidate attribute, or validation eg. via is_email() would be useful.

I’d think an additional email field in stead of adding an option to the text field would be a better implementation.