On the file preview in the file manager

[ligq]

It is great that the preview has been integrated with the file manager. Hope the Space key could toggle the preview window, i.e. press Space to open the preview window, press Space again to close the preview window. Another request: When I click on a new file or use the arrow keys to select a new file, hope the preview window could load the new file, like the Quicklook does. Thanks.