title: Combobox and button in ExtJS Composite field
body: <p>Iam Using compositfield for Combobox and edit button as side by side
  for this my code is </p>
  
  <pre><code>{
      xtype: 'fieldset',
      title: 'Covered under warranty',
      checkboxToggle: true,
      labelAlign: 'right',
      autoHeight: true,
      width: 730,
      items: [{
          bodyStyle: 'padding-left:5px;',
          layout: 'table',
          autoHeight: true,
          autoWidth: true,
          layoutConfig: {
              columns: 2
          },
          defaults: {
              frame: true,
              style: 'margin: 0 0 1px 3px'
          },
          items: [{
              xtype: 'fieldset',
              title: 'Warranty Manufacturer',
              autoHeight: true,
              width: 360,
              labelWidth: 110,
              items: [{
                  xtype: 'compositefield',
                  defaults: {
                      height: 20
                  },
                  fieldLabel: 'Company',
                  items: [ComboComanyinWarranty, btnEdit]
              }, {
                  xtype: 'compositefield',
                  defaults: {
                      height: 20
                  },
                  fieldLabel: 'Company Location',
                  width: 220,
                  items: [ComboCompanyLocationInWarranty]
              }, {
                  xtype: 'compositefield',
                  defaults: {
                      height: 20
                  },
                  fieldLabel: 'Contact Person',
                  width: 220,
                  items: [ComboContactPersonInWarranty, {
                      xtype: 'button',
                      text: '...'
                  }]
              }, {
                  xtype: 'compositefield',
                  defaults: {
                      height: 20
                  },
                  fieldLabel: 'Contact Phone',
                  items: [{
                      xtype: 'displayfield',
                      value: ''
                  }]
              }, {
                  xtype: 'compositefield',
                  defaults: {
                      height: 20
                  },
                  fieldLabel: 'Contact Mobile',
                  items: [{
                      xtype: 'displayfield',
                      value: ''
                  }]
              }, {
                  xtype: 'compositefield',
                  defaults: {
                      height: 20
                  },
                  fieldLabel: 'Contact Email',
                  items: [{
                      xtype: 'displayfield',
                      value: ''
                  }]
              }]
  
          }
     }
  </code></pre>
  
  <p>but buttons are not displaying properly bottom part of the button cut.
  so please help</p>
  
  <p>Thanks in advance</p>