title: wx.ScrolledWindow scrollbar is going to the top after closing subframe
body: <p>In my app I need to make around 150 dynamically created panels with descriptions and buttons. </p>
  
  <p>Each button will show another url in new window. </p>
  
  <p>When you scroll main window for example to middle and click button on panel new frame with url shows. </p>
  
  <p>When you close it scrollbar goes to the top of main frame. </p>
  
  <p>How can I prevent that and keep scrollbar in main frame in same position like before opening subwindow?</p>
  
  <p>Thank You for any help!</p>
  
  <pre><code>import wx
  import wx.lib.scrolledpanel
  import wx.html2
  
  class Start ( wx.Frame ):
      def __init__( self, parent ):
          wx.Frame.__init__ ( self, parent, id = wx.ID_ANY, title = 
          wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 800,800 ), style = wx.DEFAULT_FRAME_STYLE|wx.TAB_TRAVERSAL )
  
          self.SetSizeHintsSz( wx.DefaultSize, wx.DefaultSize )
          self.SetBackgroundColour( wx.SystemSettings.GetColour( wx.SYS_COLOUR_HIGHLIGHT ) )
          bSizer23 = wx.BoxSizer( wx.VERTICAL )
  
          self.m_scrolledWindow2 = wx.ScrolledWindow( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.HSCROLL|wx.VSCROLL )
          self.m_scrolledWindow2.SetScrollRate( 5, 5 )
          bSizer24 = wx.BoxSizer( wx.VERTICAL )
  
          for x in range(100):
              self.m_panel1 = wx.Panel( self.m_scrolledWindow2, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.TAB_TRAVERSAL )
              self.m_panel1.SetBackgroundColour( wx.SystemSettings.GetColour( wx.SYS_COLOUR_INFOBK ) )
  
              bSizer25 = wx.BoxSizer( wx.VERTICAL )
              self.m_panel2 = wx.Panel( self.m_panel1, wx.ID_ANY, wx.DefaultPosition, wx.Size( 500,300 ), wx.TAB_TRAVERSAL )
              bSizer26 = wx.BoxSizer( wx.VERTICAL )
  
              #buttons
              bSizer12 = wx.BoxSizer( wx.HORIZONTAL )
              bSizer12 = wx.BoxSizer( wx.HORIZONTAL )
              self.strona_projektu_button = wx.Button( self.m_panel2, wx.ID_ANY, u"Button", wx.DefaultPosition, wx.DefaultSize, 0 )
              bSizer12.Add( self.strona_projektu_button, 0, wx.ALL, 5 )
  
              self.strona_projektu_button.Bind(wx.EVT_BUTTON, lambda evt, name='Button': self.show_web(evt,))
  
              self.m_panel2.SetSizer( bSizer26 )
              self.m_panel2.Layout()
              bSizer26.Fit( self.m_panel2 )
              bSizer25.Add( self.m_panel2, 1, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )
  
              self.m_panel1.SetSizer( bSizer25 )
              self.m_panel1.Layout()
              bSizer25.Fit( self.m_panel1 )
              bSizer24.Add( self.m_panel1, 1, wx.ALL|wx.ALIGN_CENTER_HORIZONTAL, 5 )
  
              self.m_scrolledWindow2.SetSizer( bSizer24 )
              self.m_scrolledWindow2.Layout()
              bSizer24.Fit( self.m_scrolledWindow2 )
              bSizer24.Layout()
  
          bSizer23.Add( self.m_scrolledWindow2, 1, wx.EXPAND |wx.ALL, 5 )
          self.SetSizer( bSizer23 )
          self.Layout()
          self.Centre( wx.BOTH )
  
  
      def show_web( self, event,  ):
          dialog = MyBrowser(None) 
          dialog.browser.LoadURL('https://google.com') 
          dialog.Show() 
  
  
  class MyBrowser(wx.Frame): 
      def __init__(self, *args, **kwds): 
          wx.Frame.__init__(self, *args, **kwds) 
          self.Bind ( wx.EVT_CLOSE, self.on_close )
          sizer = wx.BoxSizer(wx.VERTICAL) 
          self.browser = wx.html2.WebView.New(self) 
          sizer.Add(self.browser, 1, wx.EXPAND, 10) 
          self.SetSizer(sizer) 
          self.SetSize((1000, 700)) 
  
      def on_close ( self, event ):    
          self.Destroy()
  
  if __name__=='__main__':
      app = wx.App(0)
      frame = Start(None).Show()
      app.MainLoop()
  </code></pre>