Merge pull request #16724 from owncloud/mimetype-js

apps/files_sharing/api/local.php

apps/files_sharing/js/sharedfilelist.js

config/mimetypealiases.json

core/command/maintenance/mimetypesjs.php

core/js/config.php

core/js/core.json

core/js/mimetype.js

core/js/mimetypelist.js

core/js/tests/specs/mimeTypeSpec.js

core/register_command.php

lib/base.php