Deprecation: #80512 - DocumentTemplate->extJScode property 

See forge#80512

Description 

The property DocumentTemplate->extJScode to load ExtJS-specific code "onExtJSReady" has been marked as deprecated.

Impact 

If the property is filled and added to the response output, a deprecation warning will be triggered.

Affected Installations 

Any installation with custom extensions using (or mis-using) this property to inject ExtJS-specific code.

Migration 

Use the PageRenderer object directly to inject addExtOnReadyCode in a backend response.