Mobile - A&R - Lock records - Calendar picker cut off

## Description
**How to replicate:**
* Use a mobile device
* Navigate to the `Lock records` page in A&R
* Click on the date field

**Expected Behavior:**
* The calendar picker should be displayed in full on mobile so users can select a date

**Issue:**
* The calendar picker is cutoff on mobile


Start at the A&R Lock records page and reproduce the cutoff date-field calendar picker on a mobile device. Inspect the mobile date-field behavior and verify that the full calendar is visible and usable for selecting a date.

Written by the indexing model from the issue text.