[IMP] change the icon and tooltip of heat map (column) in graph view (addon web_graph)

bzr revid: ged@openerp.com-20140117093302-1lprauuu4e5k8s5x

addons/web_graph/static/src/xml/web_graph.xml

@@ -26,8 +26,8 @@
             <label class="btn btn-default" data-mode="row" title="Heat Map (rows)">
                 <input type="radio" name="heatmap"/><span class="fa fa-bars"></span>
             </label>
-            <label class="btn btn-default" data-mode="col" title="Heat Map (cols)">
-                <input type="radio" name="heatmap"/><span class="fa fa-pause"></span>
+            <label class="btn btn-default" data-mode="col" title="Heat Map (columns)">
+                <input type="radio" name="heatmap"/><span class="fa fa-bars fa-rotate-90"></span>
             </label>
         </div>