title: TLabel OnMouseDown event not firing in Firemonkey
body: <p>I'm trying to change a <code>TLabel</code> color when the user touches it, but it looks like the <code>MouseDown</code> event is not being fired.</p>
  
  <pre><code>procedure TForm_Master.tv_1Down(Sender: TObject;
    Button: TMouseButton; Shift: TShiftState; X, Y: Single);
  begin
  tv_1.FontColor := TAlphaColors.Dodgerblue;
  end;
  </code></pre>
  
  <p>What could possibly be going wrong?</p>