message: Better macOS 11 icon for updates tab
diff: #include "errors.h"
  #include "extractors/extractor_legacy.h"
  #include "spellchecking.h"
  +#include "str_helpers.h"
  #include "utility.h"
  #include "customcontrols.h"
  #include "unicode_helpers.h"
  @@ -1127,7 +1128,7 @@ class UpdatesPage : public wxPreferencesPage
  {
  public:
  wxString GetName() const override { return _("Updates"); }
  - wxBitmap GetLargeIcon() const override { return MacPageIcon("Prefs-Updates", "arrow.triangle.2.circlepath.circle"); }
  + wxBitmap GetLargeIcon() const override { return MacPageIcon("Prefs-Updates", "arrow.down.circle"); }
  wxWindow *CreateWindow(wxWindow *parent) override { return new UpdatesPageWindow(parent); }
  };
  #endif // HAS_UPDATES_CHECK
  