title: Set search options for columns in MvcJqGrid
body: <p>I can't find a way to set search options for a column? It seem they are set by default and there's no way I can change it.</p>
  
  <p>We have this option in Jqgrid:</p>
  
  <pre><code>{ name: "outputid", index: "outputid", width: 30, searchoptions: { sopt: ['eq']} }
  </code></pre>
  
  <p>When doing this in MvcJqGrid:</p>
  
  <pre><code>.AddColumn(new Column("promoDate").SetAlign(MvcJqGrid.Enums.Align.Center).SetLabel("Fecha Ingreso").SetSearchType(Searchtype.Datepicker).SetSearchDateFormat("yy-mm-dd"))
  </code></pre>
  
  <p>I receive a 'bw' as rule op, not 'eq' as I would like to set.</p>
  
  <p>Thanks!</p>