anchor.diff:                title: 'Databases',
                 autoScroll: true,
                 id:'workbench-biodatabase-tab',
  -              items: [
  -                {id: 'workbench-biodatabase-grid',
  +              items: [ {
  +                  id: 'workbench-biodatabase-grid',
                     xtype:'biodatabase-grid',
                     pageSize: dbPageSize,
                     store: biodatabaseStore
  -                }
  -              ]
  +                } ]
               }, {
                 iconCls:'book',
                 title: 'Database Groups',
                 autoScroll: true,
                 id:'workbench-biodatabase-group-tab',
  -              items: [
  -                {id: 'workbench-biodatabase-groups-grid',
  +              items: [ {
  +                  id: 'workbench-biodatabase-groups-grid',
                     pageSize: databaseGroupPageSize,
                     xtype:'biodatabase-group-grid' ,
  -                  store: biodatabaseGroupStore }
  -              ]
  +                  store: biodatabaseGroupStore 
  +                } ]
   
               },  {
                 iconCls:'cog_edit',
                 title: 'Blast Results',
                 autoScroll: true,
                 id:'workbench-blast-result-tab',
  -              items: [
  -                {id: 'workbench-blast-results-grid',
  +              items: [ {
  +                  id: 'workbench-blast-results-grid',
                     pageSize: blastResultPageSize,
                     xtype:'blast-result-grid' ,
  -                  store: blastResultStore }
  -              ]
  +                  store: blastResultStore 
  +                } ]
   
               }, {
                 iconCls:'grid_icon',
                 title: 'Running Jobs',
                 autoScroll: true,
                 id:'workbench-running-jobs-tab',
  -              items: [
  -                { id: 'workbench-jobs-grid',
  +              items: [ { id: 'workbench-jobs-grid',
                     pageSize: jobPageSize,
                     xtype:'job-grid' ,
                     store: jobStore }
  
positive.code:             Ext.bio.workbench.updateContent(node);
              Ext.getCmp('tree-delete-icon').enable();
            }
          } ,
  
          new Ext.TabPanel({
            id: 'workbench-grid-tabs',
            region: 'center', // a center region is ALWAYS required for border layout
            collapsible: true,
            deferredRender: true,
            activeTab: 0,     // first tab initially active
            items: [
              {
                iconCls:'new_fasta',
                title: 'Sequences',
                id: 'workbench-biosequence-tab',
                layout: 'border',
  
negative.code:         {  region: 'north',
            items: [tb],
            height: 32 // give north and south regions a height
          }, {
            region: 'west',
            title: 'Database Browser',
            width: 200,
            minSize: 175,
            margins: '0 0 0 5',
            collapsible: true,
            split: true,
            id: 'bio-database-group-tree',
            xtype:'database-group-tree',
            treeData: dbGroupTree,
  