message: Fix blur icon app in 10.11 (mac)
diff: icon = [NSImage imageNamed:@"AppIconActive"];
  break;
  case AppIconTypeDefault :
  + if (@available(macOS 10.12.0, *))
  + {
  icon = [NSImage imageNamed:@"AppIcon"];
  + } else {
  + icon = [NSImage imageNamed:NSImageNameApplicationIcon];
  + }
  +
  break;
  }
  