title: Label expands vertically in a QVBoxLayout
body: <p>I have inserted a <code>QLabel</code> with a small sentence, a <code>QLineEdit</code> and a <code>QPushButton</code>, in this order, into a <code>QVBoxLayout</code>. My main window is 70% of the user's desktop.</p>
  
  <p>My problem is that my label expands to nearly 80% of the parent window's height and the <code>QLineEdit</code> and the `QButton\ are squeezed at the bottom.</p>
  
  <p>I figured out a way to solve this: I inserted more labels with no content but this can't be the golden solution. What can I do?</p>
  
  <p>I also tried <code>QFormLayout</code> but it does not fit my needs. I like the widgets to be in a vertical order. I tried many ways with <code>QSizePolicy</code> but it did not work out.</p>