ENYO-2791: FileChooser rewriting

Related JIRA: https://enyojs.atlassian.net/browse/ENYO-2791

FileChooser allows to choose:
* a folder path
* a file path
* a folder path with a specific file name

Checked on Windows 7 : Chrome

Enyo-DCO-1.1-Signed-off-by: Vincent HERILIER vincent.herilier@hp.com