3.0: [UI] apos-input--time/date are preventing browser native date/time widget

## To Reproduce
While in management mode (apos administration form) remove the `apos-input--time` or `apos-input--date` class of any previously defined `date` or `time` field from the development tools of a browser.
The native date/time icon will be shown beside the one styled by apos UI. Clicking it will open the native browser date-time widget (modern browsers)

## Expected behavior
Currently the only way to enter date/time is typing them. Apostrophe UI should allow the browser native calendar widget to be used.

## Details

**Apostrophe*
v3.0.1*

**Browsers**
Chrome, Chromium, Edge Beta, Brave, Firefox

**Operating System:**
Ubuntu 20.04.2 LTS

**Screenshots**

Start by locating the management-form implementation and the `apos-input--time` and `apos-input--date` classes. Reproduce the issue in a modern browser, then verify that date and time fields expose the native browser widget without the duplicate styled control.

Written by the indexing model from the issue text.