This store emits on every value change the validity of every
name group. The value is an object that contains the
Object that contains the following properties:
valid- If the field is valid
invalid- If the field is invalid
message- If the form is invalid, the message to display.
errors- An object with the keys of the current errors applied to the field (the value is
message will always be the first one to match, HTML5 errors first (e.g HTML required comes before HTML minlength)
then custom errors from
errors object may contain more than one key for errors that apply.