title: adding border to list item selection
body: <pre><code>       xtype:'list',
       // disableSelection: true,  
        scrollToTopOnRefresh: false,
        style:'background:red',
        store: 'PchatStore',
        selectedCls:'chatmsg',
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/lXIG0.png" alt="image border is not applied to top"></p>
  
  <pre><code>.chatmsg{
  
        border-bottom : 7px solid yellow;  
  
         border-left : 7px solid yellow;  
  
          border-right : 7px solid yellow; 
  
          border-top : 7px solid yellow;  
  </code></pre>
  
  <p>}</p>
  
  <p>the <code>border</code>is not applied on top of the <code>list</code>on selecting a <code>list</code>item</p>