title: jqgrid search a dropdown (select element) label not value
body: <p>I have a jqgrid that is completely populated locally. I have a select element in the grid aswell. This is produced as shown below</p>
  
  <pre><code>{ name: 'sparkline', width: 200, editable: true, edittype: 'select', formatter: 'select', editoptions: { value: sparklinedropdownstring }, classes: "extracellpadding" }
  </code></pre>
  
  <p>the variable 'sparklinedropdownstring' is a string set out like the examples from <a href="http://www.trirand.com/jqgridwiki/doku.php?id=wiki:common_rules" rel="nofollow">http://www.trirand.com/jqgridwiki/doku.php?id=wiki:common_rules</a></p>
  
  <p>"value:label;value1:label1;value2:label2;value4:label5;"....etc etc</p>
  
  <p>Now whenever I use the search bar or sort it always sorts or searches based on the value and not the label, I was wondering if i could search via the label instead? there are a few times where the value doesn't have a lot in common with the label and the average user would search for a label rather then a programmer's value.</p>
  
  <p>My search and sort toolbars are setout like so:</p>
  
  <pre><code>myGrid.jqGrid('navGrid', '#mypager', { edit: false, add: false, del: false, search: false });
  myGrid.jqGrid('filterToolbar', { stringResult: true, searchOnEnter: false, defaultSearch: "cn" });
  </code></pre>