mono/xwt — pull request #423 by sevoku (2014-12-20 10:12:57+00:00)
Title: Refine DatePicker API and impement DatePickerStyle support [Gtk][Mac]

This PR adds DatePickerStyle support to Gtk and Mac backends, and includes many fixes in the backend implementations.

* GTK:
* fix component selection
* fix (keep) seconds when other component chages
* fix keyboard input (incl. arrow keys and separators)
* fix mouse selection
* add internationalization support
* use localized separators
* use localized component order
* no 12/24 support
* add DatePickerStyle support (show only relevant components)
* add clipboard support
* MAC:
* add DatePickerStyle support
* fix DatePicker timezone conversion

For WPF we still need a useful DateTimePicker component. Maybe something external from NuGet?