title: Remove grid line in tableView
body: <p>I am trying to remove the grid line inside table view of each cell using css. 
  <img src="https://i.stack.imgur.com/pby6G.png" alt="enter image description here"></p>
  
  <p>For example, between the Name and Description column, there is a line which I assumed that it is grid line. I have no idea to remove it using css. I can do it in Java Swing using setShowGrid(false); but this does not available in javaFX.</p>