message: Close placeholder window only on Windows
diff: @@ -1502,6 +1502,15 @@ export class WindowHandler {
  ipcMain.removeListener('screen-source-select', screenSourceSelect);
  this.removeWindow(opts.winKey);
  this.screenPickerWindow = null;
  + if (isWindowsOS) {
  + if (
  + this.screenPickerPlaceholderWindow &&
  + windowExists(this.screenPickerPlaceholderWindow)
  + ) {
  + this.screenPickerPlaceholderWindow.close();
  + this.screenPickerPlaceholderWindow = null;
  + }
  + }
  });
  }
  