Define keyboard shortcuts in behaviors array of module

[tim-kilian]

Problem

The keyboard shortcut of the behaviors are not visible until you look into the behavior. The behavior should only include the functionality and not the controller part of the keyevents.

Solution

Define the events like this and define multiple events as multiple behaviors. Behaviors can be reused.

[ [ 'del' ], KeypressBehavior ],
[ [ 'backspace' ], KeypressBehavior ],