disabledDates customPredictor not correct

[sobchenyuk]

`customPredictor: (date) => {

var current = moment(date).startOf('day'), from = moment(fromField).startOf('day');

if (current.isBefore(from)) { return true; } }`

[sobchenyuk]

when the date is disabled - the month of this date is not available, although you need to enable it

[attikos]

Same: When disabled date 15 March 2019 and clicked to choose a month, a March is disabled, but clicked in arrow I can choose 16 March an example. A March should be available for selection and prev month is disabled.