DatePicker Blur event data research

[WissamProgress]

Steps to reproduce:

• visit this link https://stackblitz.com/edit/react-sw4tfe?file=app%2Fmain.jsx
• select a date from the DatePicker pop-up
• event.target.value will return undefined

Workaround: https://stackblitz.com/edit/react-fmrynq-jw3mkz?file=app%2Fmain.jsx

It is more convenient to have something like e.value to return the value instead of using e.target.value and e.relatedTarget.value (like in the above workaround) and its implementation should be researched to see if it is possible.

Related to Ticket ID: 1598038

[kdikov82]

Related with (in regards of the e.target): https://github.com/telerik/kendo-react/issues/1442

Since the blur event will fire for any element within the component, unifying the target will not be possible. As for the value, I am not sure that it serves any purpose within the onBlur event and we are also using generic type for the event's parameter and it will be a major breaking change at this point.