message: Fix not showing hi-res window icons on Linux
  Set all icon sizes that we have available, not just a subset of them.
diff: @@ -476,8 +476,11 @@ PoeditFrame::PoeditFrame() :
  #if defined(__WXGTK__)
  wxIconBundle appicons;
  appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(16,16)));
  + appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(24,24)));
  appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(32,32)));
  appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(48,48)));
  + appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(256,256)));
  + appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(512,512)));
  SetIcons(appicons);
  #elif defined(__WXMSW__)
  SetIcons(wxIconBundle(wxStandardPaths::Get().GetResourcesDir() + "\\Resources\\Poedit.ico"));
  