Inconsistency between text input and time picker

### I'm Submitting a ...

```
[x] Bug report
[ ] Feature request
[ ] Support request
```

### Steps to Reproduce

1. open http://codepen.io/anon/pen/evveQG (a simple example of react-datetime with added timeFormat="h:mm:ss")
2. use time picker arrows to increase the time to 13:00:00 (not directly via the text input)

Also trying to
### Expected Results

Text input shows 13:00:00 - time picker shows 13:00:00

### Actual Results

Text input shows 1:00:00 - time picker shows 13:00:00

Also... inputing 13:00:00 directly causes the time picker reset (0:00:00)


Reproduce the mismatch in the linked CodePen using timeFormat="h:mm:ss", checking both time-picker arrow changes and direct 13:00:00 entry. No repository file or test is named; trace the component's text-input and time-picker handling, with the issue resolved when both display and accept the same value.

Written by the indexing model from the issue text.