Merge pull request #3151 from nextcloud/navigation-icons

apps/files_external/img/app-dark.svg

apps/files_external/lib/Settings/Section.php

apps/files_external/tests/Settings/SectionTest.php

apps/theming/img/app-dark.svg

apps/theming/lib/Settings/Section.php

apps/theming/tests/Settings/SectionTest.php

apps/user_ldap/lib/Settings/Section.php

apps/user_ldap/tests/Settings/SectionTest.php

apps/workflowengine/lib/Settings/Section.php

core/css/apps.scss

core/img/actions/settings-dark.svg

lib/composer/composer/autoload_classmap.php

lib/composer/composer/autoload_static.php

lib/private/Server.php

lib/private/Settings/Manager.php

lib/private/Settings/Section.php

lib/public/Settings/IIconSection.php

lib/public/Settings/ISection.php

settings/Controller/AdminSettingsController.php

settings/css/settings.css