add type (or kind) of textfield

It would be nice to have the ability to control input fields a bit, kind of like secure for password fields, but more general, for these types (sort of like html5 field types).

• arbitrary strings (default)
• password (the current secure inside style)
• email (brings up the email keyboard)
• integer (brings up the numeric keyboard)

perhaps one day down the road you could have touch id and other kinds.

not a high priority, since there is a decent alternative. just a nice to have.