Updating custom themes input addon

web/sass-files/sass/partials/_settings.scss

@@ -103,7 +103,7 @@
                     text-overflow: ellipsis;
                     margin-bottom: 0;
                 }
-                .input-group-addon:not(:first-child) {
+                .input-group-addon {
                     background: transparent;
                 }
                 .radio {