Fix some JSLint warnings

apps/files/js/file-upload.js

apps/files/js/fileactions.js

apps/files/js/keyboardshortcuts.js

apps/files_sharing/js/public.js

apps/files_versions/js/versions.js

apps/user_ldap/js/settings.js

core/js/compatibility.js

core/js/config.js

core/js/jquery.ocdialog.js

core/js/listview.js

core/js/multiselect.js

core/js/oc-dialogs.js

core/js/oc-vcategories.js

core/js/router.js

core/js/share.js

settings/js/apps.js

settings/js/log.js

settings/js/personal.js

settings/js/users.js