Duplicate IDs cause screen reader to not read associated input

Problem/Motivation

Having multiple elements with the same ID causes issues for screen readers.
When a label has a for attribute associated with the date picker.

Steps to reproduce

1. Use a screen reader to read the date picker.
2. The screen reader will not read the text the label is associated with since multiple IDs exist.

Proposed resolution

Use a different ID for the duet-date-picker element and the input element.