Remove superfluous selector part

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

apps/theming/css/settings-admin.css

@@ -69,7 +69,7 @@ form.uploadButton {
     margin: 10px;
 
 }
-#theming_settings_loading.icon-loading-small {
+#theming_settings_loading {
     display: inline-block;
     vertical-align: middle;
     margin-right: 10px;