ENYO-2494: Focus is put on node concerned by any file action

Related JIRA: https://enyojs.atlassian.net/browse/ENYO-2494

Scroll focus is correctly put on node concerned by any file action (especially as a folder is created in order to have a new project)
Checked on Windows 7 : FF/Chrome/Chrome Canary/Opera/Safari/IE 9 & 10

Enyo-DCO-1.1-Signed-off-by: Vincent HERILIER vincent.herilier@hp.com