Multiline form fields

Several users have been asking for linebreaks in Q & A and cafeteria comments. I looked into it and it's very easy to do: We only have to set this.textInputType = TextInputType.multiline in TCFormFieldModel and we get a visual keyboard with a key for linebreaks.

@mlbn33 Which way would you prefer the change? Allow multiline input by default and turn it off for the login fields and Business Cards form fields or the other way around?