Convert Unix to Local time in time-picker if users input.

[ZonaHex]

If users copy a Unix value to the time-picker input area, we want the component to convert it to a local time value automatically. This value might need to be the same format as Arco's time-picker's 'value-format' : X. We also need to consider the difference between X and x, because we do not want users to lose any value.