Hello!

According to the
https://edk2-docs.gitbook.io/edk-ii-vfr-specification/2_vfr_description_in_bnf/211_vfr_form_definition#2.11.6.7.1-vfr-string-statement-definition
it is possible to add `MULTI_LINE` flag to the VFR string element.

For example:
```
string
varid = FormData.StringValue,
prompt = STRING_TOKEN(STRING_PROMPT),
help = STRING_TOKEN(STRING_HELP),
flags = MULTI_LINE,
minsize = 5,
maxsize = 10,
endstring;
```
But how does it work? How to type `new line` in the HII? Because when
I type `enter` it simply changes the current value.

Best regards,
Konstantin Aladyshev