Try to flicker less when redrawing lists

gui/errorDialog.py

@@ -48,6 +48,7 @@ class ErrorHandler:
                 app = wx.App(False)
                 cls.__frame = ErrorFrame(None)
                 cls.__frame.addException("".join(t))
+                cls.__frame.Show()
                 app.MainLoop()
                 sys.exit()
             else:
@@ -121,7 +122,5 @@ class ErrorFrame(AuxiliaryFrame):
 
         self.Centre(wx.BOTH)
 
-        self.Show()
-
     def addException(self, text):
         self.errorTextCtrl.AppendText("\n{}\n\n{}".format("#" * 20, text))