clean up

openlp.pyw

@@ -97,7 +97,7 @@ class OpenLP(QtGui.QApplication):
         QtCore.QObject.connect(Receiver.get_receiver(),
             QtCore.SIGNAL(u'cursor_normal'), self.setNormalCursor)
         # Decide how many screens we have and their size
-        screens = ScreenList.get_instance(self.desktop())
+        screens = ScreenList(self.desktop())
         # First time checks in settings
         has_run_wizard = QtCore.QSettings().value(
             u'general/has run wizard', QtCore.QVariant(False)).toBool()

openlp/core/ui/screen.py

@@ -46,9 +46,7 @@ class ScreenList(object):
     instance = None
 
     @staticmethod
-    def get_instance(desktop=None):
-        if desktop is not None and ScreenList.instance is None:
-            ScreenList.instance = ScreenList(desktop)
+    def get_instance():
         return ScreenList.instance
 
     def __init__(self, desktop):
@@ -58,6 +56,7 @@ class ScreenList(object):
         ``desktop``
             A ``QDesktopWidget`` object.
         """
+        ScreenList.instance = self
         self.desktop = desktop
         self.preview = None
         self.current = None