Fix helpers

docs/documentation/modifiers/helpers.html

@@ -28,17 +28,7 @@ doc-subtab: helpers
           <td>Moves an element to the right</td>
         </tr>
         <tr>
-          <th>Overlay</th>
-          <td><code>is-overlay</code></td>
-          <td>Completely covers the first positioned parent</td>
-        </tr>
-        <tr>
-          <th>Size</th>
-          <td><code>is-fullwidth</code></td>
-          <td>Takes up the whole width (100%)</td>
-        </tr>
-        <tr>
-          <th rowspan="4">Other</th>
+          <th rowspan="2">Spacing</th>
           <td><code>is-marginless</code></td>
           <td>Removes any <strong>margin</strong></td>
         </tr>
@@ -46,6 +36,14 @@ doc-subtab: helpers
           <td><code>is-paddingless</code></td>
           <td>Removes any <strong>padding</strong></td>
         </tr>
+        <tr>
+          <th rowspan="4">Other</th>
+          <td><code>is-overlay</code></td>
+          <td>Completely covers the first positioned parent</td>
+        </tr>
+          <td><code>is-clipped</code></td>
+          <td>Adds overflow <strong>hidden</strong></td>
+        </tr>
         <tr>
           <td><code>is-radiusless</code></td>
           <td>Removes any <strong>radius</strong></td>