title: ExtJs Ext.PagingToolbar: hide or set parameters for the refresh button onclick?
body: <p>No customized setup for the refresh button, so I am trying to hide/remove it.
  <code>hideRefresh: true</code> didn't work for me.</p>
  
  <p>If there is no way to hide it, can I at least pass some parameters when the button is clicked, so I can make it do some meaningful tasks?</p>
  
  <pre><code>pPanel = new Ext.Panel({
      applyTo: 'newProgWin',
      autoScroll:true,
      styleClass: 'formInput',
      bodyStyle: 'overflow-x: hidden',
      align: 'center',
      layout:'fit',
      width:899,
      height:450,
      closeAction:'hide',
      plain: true,
      items: winDataView = new Ext.DataView({
          tpl: resultTpl,
          store: npDs,
         itemSelector: 'div.search-item'
      }),
  
      tbar: [
                  'Search: ', ' ',
              (winSearchField = new Ext.ux.form.SearchField({
                  store: npDs,
                  width:300
              }))
          ],
      bbar: new Ext.PagingToolbar({
                  beforeLoad : function()
                  {
                      pocProxy.extraParams = {
                          eps: currentProgs,
                          stateful: true,
                          dataCall: dataCallId,
                          orgNameConvention: currentOnc,
                          installation: currentInstallation
                      };
                  },   
                  store: npDs,
                  pageSize: pageSize,
                  displayInfo: true,
                 //hideRefresh: true,
                  displayMsg: 'Organizations {0} - {1} of {2}',
                  emptyMsg: "No Organizations available to display"
  
              })
  });
  </code></pre>