fix: keep left-only pulldown full width

styles/21-patterns-options-row.css

@@ -105,6 +105,10 @@
     flex-basis: calc(50% - (var(--layout-options-row-group-gap) / 2));
   }
 
+  .sg-options-row--left-only .sg-options-row__left > .sg-pulldown-demo {
+    flex-basis: 100%;
+  }
+
   .sg-options-row__left > .sg-search-field-row {
     flex: 0 0 100%;
     width: 100%;