Fixed: Textual CPDatePicker issue with number of digit

Previously, the day/month/hour of the textual datePicker had always two digits, even when the number was under 10. For instance the day 8 was displayed 08.
Now it's like in cocoa, 8 is displayed 8.

Fixes #2059
Merge pull request #2067 from Dogild/DatePickerOneDigit

Fixed: Textual CPDatePicker issue with number of digit