Fix files app LoadSidebar event (#18213)

apps/files/appinfo/app.php

apps/files/composer/composer/autoload_classmap.php

apps/files/composer/composer/autoload_static.php

apps/files/js/dist/sidebar.js

apps/files/js/dist/sidebar.js.map

apps/files/js/merged-index.json

apps/files/lib/AppInfo/Application.php

apps/files/lib/Listener/LoadSidebarListener.php

apps/files/src/sidebar.js

apps/files/src/views/Sidebar.vue

apps/files_sharing/js/dist/files_sharing_tab.js

apps/files_sharing/js/dist/files_sharing_tab.js.map

apps/files_sharing/src/files_sharing_tab.js