Calendar UI doesn't update when showTime is changed

[jbiversen]

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Plunkr Case (Bug Reports)

http://plnkr.co/edit/lLq1XmhVNVFyPhnbYZlW?p=preview

Current behavior

The displayed date doesn't change when the showTime input is changed in controller.

Expected behavior

When showTime becomes false (or true) the time part of the date should disappear (or appear) from the text in the input field.

Minimal reproduction of the problem with instructions

Check or uncheck the checkbox in the plunkr

Please tell us about your environment:

• Angular version: 4.2.6

• PrimeNG version: 5.0.2

• Browser: Chrome 62.0.3202.94