title: how to set a default value in DevExpress GridColumn
body: <p>I have the following scenario : </p>
  
  <pre><code>    private DevExpress.XtraEditors.Repository.RepositoryItemComboBox repository;
      private DevExpress.XtraGrid.Columns.GridColumn colMaster;
  </code></pre>
  
  <p>.</p>
  
  <pre><code>     this.colMaster.ColumnEdit = this.repository;
  </code></pre>
  
  <p>.</p>
  
  <pre><code>     repository.Items.Clear();
       repository.Items.AddRange(i_masters);
  </code></pre>
  
  <p>i want to have the first value of i_masters set as default. Now it's an empty box.</p>
  
  <p>Can anyone please help?
  thanks</p>