title: QtableView placeholder text before table appears
body: <p>I have a very simple QtableView like which is populated after the program runs. The program takes a few seconds before it populates the table like so..</p>
  <p><a href="https://i.stack.imgur.com/2OWsh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2OWsh.png" alt="enter image description here" /></a></p>
  <p>I am wondering how to enable a placeholder text &quot;No data&quot; on the QTableView before the program runs like so...</p>
  <p><a href="https://i.stack.imgur.com/qCDQj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qCDQj.png" alt="enter image description here" /></a></p>