title: ZK getting selected item from combobox
body: <p>I am trying to get selected value in combobox  but it returns as a ComboItem.How can I get value as string? </p>
  
  <pre><code>&lt;zscript&gt;
    &lt;![CDATA[
      String[] months = { "Ada", "Basic", "C", "C++", "Cobol", "Forth",
              "Fortran", "Go", "Groovy", "Haskell", "Java", "JavaScript", "Lisp",
              "Python", "Ruby", "Scala", "Scheme" };
    ListModel lmonths = new SimpleListModel(months);
  ]]&gt;&lt;/zscript&gt;
                      &lt;combobox id="searchCombo"
                          forward="onChange=onSearch" model="@{months}" &gt;
  &lt;!-- 
                          &lt;comboitem self="@{each='months'}"
                              label="@{months}" value="@{months}"&gt;
                          &lt;/comboitem&gt;
   --&gt;
  
                          &lt;/combobox&gt;
  </code></pre>
  
  <p>And here my onSearch method </p>
  
  <pre><code>public void onSearch(ForwardEvent event) {
  
  
          System.out.println(searchCombo.getSelectedItem());
  
  
      prodevt.search(searchCombo.getSelectedItem().toString());
          filterCbox.setChecked(true);
  
  
  
          AnnotateDataBinder binder = (AnnotateDataBinder) win.getVariable(
                  "binder", true);
  
          binder.loadAll();
  
      }
  </code></pre>