fix: compile error after updating to GXT 1.2.2 (see...

fix: compile error after updating to GXT 1.2.2 (see http://extjs.com/deploy/gxt-1.2.2/release_notes.html, API Breaking Changes)

SVN: 9728

openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/grid/AbstractBrowserGrid.java

@@ -35,7 +35,6 @@ import com.extjs.gxt.ui.client.event.GridEvent;
 import com.extjs.gxt.ui.client.event.Listener;
 import com.extjs.gxt.ui.client.event.SelectionChangedEvent;
 import com.extjs.gxt.ui.client.event.SelectionChangedListener;
-import com.extjs.gxt.ui.client.event.SelectionEvent;
 import com.extjs.gxt.ui.client.event.SelectionListener;
 import com.extjs.gxt.ui.client.store.ListStore;
 import com.extjs.gxt.ui.client.widget.Component;
@@ -548,11 +547,11 @@ public abstract class AbstractBrowserGrid<T/* Entity */, M extends ModelData> ex
             });
         button.setEnabled(false);
         grid.getSelectionModel().addListener(Events.SelectionChange,
-                new Listener<SelectionEvent<ModelData>>()
+                new Listener<SelectionChangedEvent<ModelData>>()
                     {
-                        public void handleEvent(SelectionEvent<ModelData> se)
+                        public void handleEvent(SelectionChangedEvent<ModelData> se)
                         {
-                            boolean enabled = se.selection.size() > 0;
+                            boolean enabled = se.getSelection().size() > 0;
                             button.setEnabled(enabled);
                         }