title: UIGrid (Angular JS) - having a dropdown in a table header column
body: <p>I am using Angular 1.5 and am using the UI Grid. I was wondering is there a way to put a drop-down (i.e. a select) in a header column ? I know you can do it within the "data" cells/rows of the table but unsure if it can be done in the header title ?</p>
  
  <p>See the below image link to see a visual of what I mean. I want to put the dropdown into the column header called "Value"</p>
  
  <p><a href="http://i.stack.imgur.com/SGMOc.png" rel="nofollow">enter image description here</a></p>
  
  <p>Thanks - Ronan.</p>