title: Align : 'stretch' not working for Accordion layout
body: <p>I have included an 'accordion' layout, which is included in 'west' region of a 'border' layout. But the align : 'stretch' property is not working for the accordion layout.</p>
  
  <p>Accordion Layout</p>
  
  <pre><code>var user_menu_items = new Ext.Panel({
          layout: 'accordion',
          height: 565,
          align: 'stretch',
          id: 'usermenu',
          items: [{
                  layout: 'fit',
                  title: 'Configuration',
                  id: 'menulist1',
                  html: 'Group1 Content',
                  collapseFirst: true
              }, {
                  title: 'User Action Group2',
                  id: 'menulist2',
                  html: 'Group2 Content'
              }, {
                  title: 'User Action Group3',
                  id: 'menulist3',
                  html: 'Group3 Content'
              }]
      });
  </code></pre>
  
  <p>Border Layout</p>
  
  <pre><code>Ext.create('Ext.container.Viewport', {
          layout: 'fit',
          items: [{
                  layout: 'border',
                  defaults: {
                      collapsible: false,
                      split: false,
                      bodyStyle: 'padding:2px'
                  },
                  items: [{
                          title: 'USER MENU',
                          region: 'west',
                          margins: '5 0 0 0',
                          cmargins: '5 5 0 0',
                          width: 225,
                          minSize: 100,
                          maxSize: 250,
                          collapsible: true,
                          collapsed: false,
                          bodyStyle: 'padding:0px',
                          items: [user_menu_items]
                      }]
                }],
          renderTo: Ext.getBody()
      });
  </code></pre>
  
  <p>I am using extjs-4.2.2</p>
  
  <p><a href="https://i.stack.imgur.com/aq9bR.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aq9bR.jpg" alt="enter image description here"></a></p>