title: Datagrid WPF issue column not binding
body: <p>I wanted to know how to use converter in DataColumn. When using the DESCR column from the Ord_C_Order_Status table. It is not allowing to use.
  DisplayMemberBinding="{Binding Path=ORDER_STATUS,Converter={StaticResource OrderStatusConverter}}"</p>
  
  <p>I want to use converter for this Binding for DESCR but it doesn't allow.</p>
  
  <pre><code>   &lt;dxg:GridControl DataSource="{Binding Data}"
               AutoExpandAllGroups="True"
               ShowBorder="True"
               Background="{StaticResource Background1}"&gt;
     &lt;dxg:GridControl.Columns&gt;
      &lt;!--FieldName="ORDER_KEY"--&gt;
      &lt;dxg:GridColumn Name="colORDER_KEY"
                      DisplayMemberBinding="{Binding Path=ORDER_STATUS,Converter=       {StaticResource             OrderStatusConverter}}"
                      Header="Order key" /&gt;
      &lt;dxg:GridColumn Name="colPAT_NUMBER"
                      Header="PAT_NUMBER"
                      DisplayMemberBinding="{Binding Path=FACILITY_KEY}" /&gt;
  </code></pre>
  
  <p>here is the data grid columns:
            </p>
  
  <pre><code>            &lt;dxg:GridColumn Name="colORDER_KEY"
                              FieldName="ORDER_KEY"
                              ReadOnly="True"
                              Header="Order key" /&gt;
              &lt;dxg:GridColumn Name="colPAT_NUMBER"
                              Header="PAT_NUMBER"
                              FieldName="PAT_NUMBER"
                              ReadOnly="True" /&gt;
              &lt;dxg:GridColumn Name="colFACILITY_KEY"
                              FieldName="FACILITY_KEY"
                              Header="FACILITY_KEY"
                              ReadOnly="True" /&gt;
              &lt;dxg:GridColumn Name="colPATIENT_ID"
                              Header="PATIENT_ID"
                              FieldName="PATIENT_ID"
                              ReadOnly="True" /&gt;
              &lt;dxg:GridColumn Name="colMRN"
                              FieldName="ORDER_TYPE_KEY"
                              Header="ORDER_TYPE_KEY"
                              ReadOnly="True" /&gt;
              &lt;dxg:GridColumn Name="colORDER_STATUS"
                              DisplayMemberBinding="{Binding Path=ORDER_STATUS}"
                              Header="ORDER_STATUS"
                              ReadOnly="True" /&gt;
  </code></pre>