Enhance some behaviors for DateBox/TimeBox/Calendar.

[salashnik]

1. in Calendar DATE_NAVIGATION_CHANGED event listener

this.date = updatedDate;
must be before
onDateViewUpdate(updatedDate);

causes strange behaviour when months changed

2. in DateBox calendar.setDate must be called before popover open, like this:

    private void doOpen() {
        if (isEnabled() && !isReadOnly()) {
            calendar.setDate(value);
            popover.open();
        }
    }

currently popup dont respect value entered from keyboard

3. in Calendar.setDate

calendarMonth.show();
yearMonthPicker.hide();

must be called (like this):

    public Calendar setDate(final Date date) {
        final Date oldDate = this.date;
        this.date = date;
        if (nonNull(date)) {
            onDateViewUpdate(this.date);
            onDateSelectionChanged(this.date);
            calendarMonth.show();
            yearMonthPicker.hide();
            triggerChangeListeners(oldDate, this.date);
        }
        return this;
    }

currently opens in last selected page

4. changehandler in DateBox (and TimeBox too) do not respect label

                    if (parseStrict) {
                        invalidate("Unable to parse date value " + value);
                    }

must be changed to

                    if (parseStrict) {
                        invalidate(getLabels().calendarInvalidDateFormat());
                    }

like validator check does