title: Reset a ComboBox
body: <p>I have a view that contains several ComboBox elements. For some reason old data remains from the previous time the view was opened and I would like to reset the combobox elements in the view every time it is opened. Is there a function that could that for me? I want it to be <em>exactly how it is as if I rendered it the first time with the initial items</em>. Would using <code>setSelectedItem(vItem)</code>, <code>setSelectedItemId(vItem)</code>, <code>setSelectedKey(sKey)</code>, <code>setShowSecondaryValues()</code> help? If so, what do these keywords mean (selectedItem, selectedItemID, selectedKey, secondaryValues)?</p>