Deprecation: #88651 - Replace TYPO3/CMS/Backend/SplitButtons with TYPO3/CMS/Backend/DocumentSaveActions

See forge#88651

Description

Since FormEngine doesn't use split buttons anymore with TYPO3 v9, the JavaScript module TYPO3/CMS/Backend/SplitButtons has been replaced with TYPO3/CMS/Backend/DocumentSaveActions.

Impact

Loading TYPO3/CMS/Backend/SplitButtons will trigger a deprecation log entry in the browser's console.

Affected Installations

All 3rd party extensions using TYPO3/CMS/Backend/SplitButtons are affected.

Migration

Use TYPO3/CMS/Backend/DocumentSaveActions instead. Since the module is a singleton, the instance can be fetched by calling DocumentSaveActions.getInstance().