title: Hide Title Bar of Dialog in qml
body: <p>I was using this dialog as message pop up and i want to hide the title bar
  Is there any way to hide title bar of Dialog?</p>
  
  <pre><code>   import QtQuick 2.7
     import QtQuick.Controls 2.2
  
     Dialog {
         standardButtons: DialogButtonBox.Ok
  
         property alias text : textContainer.text
  
         Text {
             id: textContainer
  
             anchors.fill: parent
  
             horizontalAlignment: Qt.AlignLeft
             verticalAlignment: Qt.AlignTop
             }
         }
  </code></pre>