[5.4] Fix unlocked and possibly uninstalled core plugins for new installs and updates#45821

muhme merged 9 commits intojoomla:5.4-devjoomla/joomla-cms:5.4-devfrom

richard67:5.4-dev-fix-unlocked-core-extensions-2025-08-02richard67/joomla-cms:5.4-dev-fix-unlocked-core-extensions-2025-08-02Copy head branch name to clipboard