title: PyQt QProgressBar vertical text alignment issue
body: <p>I am trying to change color in vertically aligned QProgressBar </p>
  
  <p>I found example of how to change color by <code>setStyleSheet</code> here:
  <a href="https://stackoverflow.com/questions/6277369/changing-the-color-of-a-qprogressbar">Changing the color of a QProgressbar()</a></p>
  
  <p>But there is not mentioned vertical alignment. Please check screenshot of my example:</p>
  
  <p><img src="https://i.stack.imgur.com/LaemA.png" alt=""></p>
  
  <p>First progress bar is default, second and third is with changed color. but text is not properly aligned (I need it as on first default bar).</p>
  
  <p>I also tried <code>setTextDirection(QtGui.QProgressBar.TopToBottom)</code> but it didn't help.</p>
  
  <p>Please advise</p>
  
  <p>Code to try it out:</p>
  
  <pre><code>import sys
  from PyQt4 import QtGui, QtCore
  
  class Window(QtGui.QMainWindow):
  
      def __init__(self):
          super(Window, self).__init__()
          self.setGeometry(50, 50, 500, 300)
  
          progress1 = QtGui.QProgressBar(self)
          progress1.setGeometry(50, 50, 25, 150)
          progress1.setOrientation(QtCore.Qt.Vertical)
          progress1.setMaximum(0)
          progress1.setMaximum(10)
          progress1.setValue(4)
          progress1.setFormat("myServer008-Load")
  
          progress2 = QtGui.QProgressBar(self)
          progress2.setGeometry(100, 50, 25, 150)
          # adding style will stop rotating text 90 degrees clockwise
          progress2.setStyleSheet("QProgressBar::chunk { background-color: red; }")
          progress2.setOrientation(QtCore.Qt.Vertical)
          progress2.setMaximum(0)
          progress2.setMaximum(10)
          progress2.setValue(4)
          progress2.setFormat("myServer008-Load")
  
          progress3 = QtGui.QProgressBar(self)
          progress3.setGeometry(150, 50, 25, 150)
          # centring text works, but still do no rotate it
          progress3.setStyleSheet("QProgressBar { text-align: center; } QProgressBar::chunk { background-color: red; }")
          progress3.setOrientation(QtCore.Qt.Vertical)
          progress3.setMaximum(0)
          progress3.setMaximum(10)
          progress3.setValue(4)
          progress3.setFormat("myServer008-Load")
  
  
  app = QtGui.QApplication(sys.argv)
  GUI = Window()
  GUI.show()
  sys.exit(app.exec_())
  </code></pre>