timepicker- mouse scroll not working with Firefox

[lazychino]

mouse scroll not working for the timepicker on Firefox 22.0
I'll try to fix it and make a pull request

[pkozlowski-opensource]

@lazychino This is the spirit! Don't forget to add tests when preparing a pull request.

[lazychino]

I found the issue was the mouse of legacy mousewheel event instead of standard wheel event, now testing hopefully it doesn't explode