chenhaodong / mew-iview

Fixes #3246

Allow DatePicker to receive TimePicker options

removed if/else related to b52e02e4367002c01d04793c2e8059965aa26b80

This ads the possibility to choose `steps` in the formatting of the
lists. So we can have ”5 in five minutes” or ”every 15 minutes” instead
of having always lists of 60 items/minutes.