change classname from .btn-dark to .btn-inverse, change use text

docs/templates/pages/base-css.mustache

@@ -1210,10 +1210,10 @@
         <td><code>.btn-danger</code></td>
         <td>{{_i}}Indicates a dangerous or potentially negative action{{/i}}</td>
       </tr>
-	  <tr>
-        <td><a class="btn btn-dark" href="#">{{_i}}Dark{{/i}}</a></td>
-        <td><code>.btn-dark</code></td>
-        <td>{{_i}}Indicates a potential abort or black magic{{/i}}</td>
+  	  <tr>
+        <td><a class="btn btn-inverse" href="#">{{_i}}Inverse{{/i}}</a></td>
+        <td><code>.btn-inverse</code></td>
+        <td>{{_i}}Alternate dark gray button, not tied to a semantic action or use{{/i}}</td>
       </tr>
     </tbody>
   </table>