Remove all backward compatibility issues, so JCB will not need the [Backward Compatibility] plugin to run. Added new import powers for custom import of spreadsheets. Move the setDocument and _prepareDocument above the display in the site view and custom admin view. Update the trashhelper layout to work in Joomla 5. Add AllowDynamicProperties (Joomla 4+5) to view class to allow Custom Dynamic Get methods to work without issues.
Improved the Schema Table update engine (more). Fix autoloader timing, and loading. Implement the Joomla Powers in JCB code, to move away from JClasses. Remove many of the SQL updates, to only use the Schema updates of table columns to avoid collusion. Fix the admin.css file loading on dashboard. #1112.
