Breaking: #81225 - Merged EXT:context_help to EXT:backend 

See forge#81225

Description 

The extension context_help has been merged into the extension backend.

Impact 

The extension backend can't be deactivated. Any check if context_help is installed will return false.

Affected Installations 

Installations with extensions with checks for extension context_help being installed.

Migration 

Remove the checks.