Allow empty/no selection in DevExpress' LookUpEdit
<p>I have a form containing a DevExpress <code>LookUpEdit</code> (Windows Forms) which is bound to a list of objects with several displayed properties. The <code>EditValue</code> property is set to another object's property which will receive the selected value.</p>

<p>The user may select any item from the list of objects, but I also want to allow empty selections i.e. the <code>EditValue</code> would become <code>null</code> and the displayed text should be the default <code>[No entry]</code> then.</p>

<p>How could this be accomplished the easiest way?</p>

<p>Currently there's no way to clear the value after it has been set once.</p>