[DateInput][RangeCalendar] Blurring the date input will reset the date unexpectedly

[BionBit]

Switching between left-right side calendar date inputs will reset the endValue unexpectedly in some cases.

STR:

1. Open the range calendar
2. Notice the date range, for example, Dec 2 - Jan 2
3. Click on the end date input
4. Click on the start date input
5. Notice that the end date input resets to Dec 2019, when it should be Jan 2020

Cause,

• Reading from 'selectedValue' is the latest value.
• Although the 'str' state gets updated in getDeritvedState, it doesn't always happen for some reason.

Proposed fix (tested locally), DateInput.js

onBlur = () => {
  this.setState((prevState, prevProps) => ({
    hasFocus: false,
    - str: formatDate(prevProps.value, prevProps.format),
    + str: formatDate(prevProps.selectedValue, prevProps.format),
    + invalid: false
  }));
}