title: ListView IsTextSearchEnabled="False" not working
body: <p>I wonder if anyone can shed some light on this for me.
  I have a multicolumn ListView bound to an ObservableCollection. The last column is a TextBox (via DataTemplate).
  Typing in the textbox is all fine UNTIL I type a character that matches one of the rows. At that point TextSearch kicks in, taking me out of my textbox and selecting the matched row.
  To avoid this, I set <strong>IsTextSearchEnabled="False"</strong> on my ListView, however it doesn't work. TextSearch always kicks in if I type a character matching one of the rows of data.</p>
  
  <p>This is driving me nuts!</p>