Breaking: #69291 - Changed registration of backend module icons

See Issue #69291

Description

The sprite icon support for backend modules introduced with CMS 7.3 has been adjusted again. The configuration has been streamlined.

Impact

The specified icon will not be recognized.

Affected Installations

Any installation running TYPO3 CMS 7.3+ having third party extensions which use sprite icons for backend modules.

Migration

Change the configuration from

'configuration' => array(
        'icon' => 'module-web',
),

to

'iconIdentifier' => 'module-web',