add support for a time picker

[subes]

see https://groups.google.com/forum/#!topic/invesdwin-platform/RsJQkxPJxU0

[subes]

Theoretically we could let the binding generator automaticallly instantiate it when the input field has type "datetime", " time" or "datetime-local" . For datetime case with both a date and time picker, for time case only for the time picker. The date picker would still operate on the "date" input type as it already does. The binding could operate as it does already on Date, Calendar, FDate, LocalDateTime. Though a policy would need to be introduced on how to initialize a time in that case when no reference date is available.

[subes]

I would try this one: https://github.com/l0rdn1kk0n/wicket-bootstrap/blob/f2095b4ab8d85f572d3308733dc678f8b69c5929/bootstrap-extensions/src/main/java/de/agilecoders/wicket/extensions/markup/html/bootstrap/form/datetime/DatetimePicker.java

Sadly the demo currently throws an exception. But running the demo locally with a different version should make it work: http://coding.teliclab.info/wicket-7.x/datetimepicker

Or just adapt it from the source code directly:

• https://github.com/l0rdn1kk0n/wicket-bootstrap/blob/f2095b4ab8d85f572d3308733dc678f8b69c5929/bootstrap-samples/src/main/java/de/agilecoders/wicket/samples/pages/DatetimePickerPage.java
• https://github.com/l0rdn1kk0n/wicket-bootstrap/blob/f2095b4ab8d85f572d3308733dc678f8b69c5929/bootstrap-samples/src/main/java/de/agilecoders/wicket/samples/pages/DatetimePickerPage.html
• https://github.com/l0rdn1kk0n/wicket-bootstrap/blob/f2095b4ab8d85f572d3308733dc678f8b69c5929/bootstrap-samples/src/main/java/de/agilecoders/wicket/samples/pages/DatetimePickerPage.js