Add wxTimePickerCtrl class.

Implement wxTimePickerCtrl natively for MSW and add a generic implementation
(very loosely based on the original class by Paul Breen) for the other
platforms.

Also update the calendar sample to show the new control.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69224 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/datetimectrl.h

@@ -13,7 +13,7 @@
 
 #include "wx/defs.h"
 
-#if wxUSE_DATEPICKCTRL
+#if wxUSE_DATEPICKCTRL || wxUSE_TIMEPICKCTRL
 
 #define wxNEEDS_DATETIMEPICKCTRL
 
@@ -43,6 +43,6 @@ public:
     typedef wxDateTimePickerCtrlBase wxDateTimePickerCtrl;
 #endif
 
-#endif // wxUSE_DATEPICKCTRL
+#endif // wxUSE_DATEPICKCTRL || wxUSE_TIMEPICKCTRL
 
 #endif // _WX_DATETIME_CTRL_H_