Breaking: #73044 - JSON for ClickMenu in Backend¶
See Issue #73044
The ClickMenu in the TYPO3 Backend now uses JSON to transport data between the server and the client.
Before, a proprietary <t3ajax> syntax with XML was used to transport the contents of the ClickMenu.
Installations with extensions that use custom ClickMenu.js behaviour.
Adapt the custom code to handle JSON responses instead of XML responses.