Deprecation: #69705 - Add unified refresh icon 

See forge#69705

Description 

The icon actions-system-refresh has been marked as deprecated in TYPO3\CMS\Core\Imaging\IconRegistry and will be removed with TYPO3 CMS 8. All requests for actions-system-refresh will now show actions-refresh.

Impact 

Using IconUtility or IconFactory to fetch the icon actions-system-refresh will trigger a deprecation log entry.

Affected Installations 

Installations with third party extensions that use the icon actions-system-refresh.

Migration 

Use the icon actions-refresh instead.