making stack chart setting

rowers/templates/flexchartstacked.html

@@ -47,6 +47,13 @@
         <input name="chartform" type="submit"
                value="Update Chart">
       </p>
+      <p>
+	<input name="save" value="Update Chart and Save Preferred Metrics"
+	       type="submit"> 
+      </p>
+      <p>
+	(This saves your preferred X and Y axes for all workouts.)
+      </p>
     </form>
   </li>
 </ul>