Move var in customize layout

customize.html

@@ -537,12 +537,7 @@ lead: Customize Bootstrap's components, LESS variables, and jQuery plugins to ge
           <input type="text" placeholder="6px">
           <label>@border-radius-small</label>
           <input type="text" placeholder="3px">
-        </div>
-      </div>
-
-      <h4>Active background color</h4>
-      <div class="row">
-        <div class="col-lg-6">
+          <h4>Active background color</h4>
           <label>@component-active-bg</label>
           <input type="text" placeholder="@brand-primary">
           <p class="help-block">Used for active or hovered items in places like navs or dropdowns.</p>