title: change style of QCompleter?
body: <p>I try to aplicate a stylesheet in a QLineEdit in especific in a popup of QCompleter.</p>
  
  <p>in  QtDesigner try:</p>
  
  <p><a href="https://i.stack.imgur.com/Jeki3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Jeki3.png" alt="enter image description here"></a></p>
  
  <p>code:</p>
  
  <pre><code>QLineEdit#lineEdit::popup{
  background:red;
  }
  </code></pre>
  
  <p>but it does not work</p>
  
  <p>What I'm looking for is to change the color of the letter, background color and alignment of the letter that appears in the box with the suggestions</p>
  
  <p>try also on QtDesigner</p>
  
  <pre><code>QAbstractItemView {}
  QAbstractItemView :: item {}
  </code></pre>
  
  <p>to change the visual properties of the list of suggestions that is displayed in the QLineEdit but they do not work</p>
  
  <p>in my code try:</p>
  
  <pre><code>from PyQt5.QtWidgets import QMainWindow,QApplication, QCompleter
  from PyQt5 import QtCore
  from PyQt5 import uic
  
  
  
  class Pricnipal(QMainWindow):
      def __init__(self):
          QMainWindow.__init__(self)
          uic.loadUi("uno.ui",self)
  
          completer = QCompleter()
  
          self.lineEdit.setCompleter(completer)
          model = QtCore.QStringListModel()
          completer.setModel(model)
          self.get_data(model)
      def get_data(self,model):
          model.setStringList(["uno","dos","tres","cuatro","este es mi nombre"])
  
  
  app  = QApplication([])
  p = Pricnipal()
  p.show()
  app.exec_()
  </code></pre>