Add support for `timestamp` fields

Problem/Motivation

Date fields work fine as designed, however this does not cover timestamps. Is it possible to extend support to include timestamp fields as well?

Steps to reproduce

Add a timestamp field to any node. Expose the date range field in views. You won't get a date popup and you'll instead have a plain text field.

Proposed resolution

None

Remaining tasks

None

User interface changes

None

API changes

None

Data model changes

None