title: setImageList in wxwidgets in setting image to all rows instead of just column header
body: <p><a href="https://i.stack.imgur.com/3OJGQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3OJGQ.png" alt="enter image description here"></a>I am trying to set up arrow and down arrow image to column header in wxlistcontrol,</p>
  
  <p>After using listControl->setImageList. when sorting is called on the listcontrol. The image is being set to all row in the first column but what i need is just the image on column headers.How do I solve this</p>