docs : merge all filters into one list

_layouts/elements.html

@@ -15,29 +15,21 @@
 
     <h3>Filters</h3>
     
-    <ul id="filters" class="option-set">
+    <ul id="filters" class="option-set floated clearfix">
       <li><a href="#show-all" class="selected">show all</a></li>
       <li><a href="#metalloid">metalloid</a></li>
-      <li>
-        <a href="#metal">metal</a>
-        <ul class="floated clearfix">
+      <li><a href="#metal">metal</a></li>
       <li><a href="#alkali">alkali</a></li>
       <li><a href="#alkaline-earth">alkaline-earth</a></li>
       <li><a href="#lanthanoid">lanthanoid</a></li>
       <li><a href="#actinoid">actinoid</a></li>
       <li><a href="#transition">transition</a></li>
       <li><a href="#post-transition">post-transition</a></li>
-        </ul>
-      </li>
-      <li>
-        <a href="#nonmetal">nonmetal</a>
-        <ul class="floated clearfix">
+      <li><a href="#nonmetal">nonmetal</a></li>
       <li><a href="#other">other</a></li>
       <li><a href="#halogen">halogen</a></li>
       <li><a href="#noble-gas">noble-gas</a></li>
     </ul>
-      </li>
-    </ul>
 
 
     <h3>Sort</h3>