Assume end of day on daterange filter when no time was passed

[curtisy1]

Filtering a date range with start and end being the same date (without time) will result in no results being found since the dates are identical (e.g. 2020-03-26~2020-03-26).

This PR takes the end of day for the end date if only the date was passed to allow for same-day filtering.

Potentially this is a breaking change if users now rely on no results being returned

[mcintyre321]

It sounds like you may be using a Date filter when you should be using a DateTime filter. Or maybe you have data with time values, but want date only data?

if you add a [DataTablesFilter(DataTablesFilterType.DateTimeRange)] as in the example, then the pickers should have a time component.

If you don't want a time component, you can change your data source to map the DateTime columns to their date only values (.Select(x => new { SomeDate = x.SomeDateTime.Date, ... }), then I think the existing code should work.