Nice idea. I remember how this is made in MS Windows (since XP):
(image from howtogeek.com)
In 2010 Nautilus proposed something similar:
(image from webupd8.org
The idea behind this is simple: all items have checkboxes near them and any amount of items may be selected with mouse. I have seen this first time on some Windows-based tablet in 2008.
How to get this functionality in Caja? Do we have any extension or action for this?