Issue #3320529 by justcaldwell: block_classes_stored setting only retains classes from most recently saved block (!7) · Merge requests · project / block_class

Fixes BlockClassHelperService::blockClassPreSave() where $current_block_classes is incorrectly merged with itself, rather than $block_classes_stored.

Issue #3320529 by justcaldwell: block_classes_stored setting only retains classes from most recently saved block