Add ESC and UP/DOWN keyboard shortcuts to dashboard dropdown

commit 5c30edd01220cd6acb43cb13628315756e285cef
Merge: 33b3111 4e90e88
Author: James Kiesel <james.kiesel@gmail.com>
Date:   Sun Aug 10 22:57:33 2014 -0400

    Merge branch 'master' into header-keyboard-shortcuts-hotfix

    Conflicts:
    	app/assets/javascripts/application.js

commit 33b3111967499ac3563e876e70c1f1f593bf2b68
Author: James Kiesel <james.kiesel@gmail.com>
Date:   Sun Aug 10 22:54:04 2014 -0400

    Add up/down keyboard shortcuts to groups dropdown

commit d5586cbbba24734173181ec2355d573d73dc45e8
Author: James Kiesel <james.kiesel@gmail.com>
Date:   Tue Aug 5 22:36:53 2014 -0400

    Add ESC hotkey
Merge pull request #1632 from loomio/header-keyboard-shortcuts-hotfix

Header keyboard shortcuts hotfix