created by: @chillu (ischommer)
created at: 2012-11-07
original ticket: http://open.silverstripe.org/ticket/8004
We could do this through the "hotkeys" plugin for jstree (http://www.jstree.com/documentation/hotkeys),
but would have to review the library behind it first: https://github.com/jeresig/jquery.hotkeys/.
Its two years old, and has a dozen pull requests outstanding, so pretty much abandoned.
Some of these requests seem important, e.g. avoid keyboard listeners on password fields.
Also need to figure out if its compatible with newer jQuery versions.