ENYO-2449: add right click menu in hermesFileTree and activate it only for the file manager

Related JIRA: https://enyojs.atlassian.net/browse/ENYO-2449

Add right click menu in hermesFileTree and it is activated only for the file manager, not for the file choosers.
It will propose only new folder and new file actions for every nodes, and folder/file copy/rename/delete actions for nodes other than project root node.

Enyo-DCO-1.1-Signed-off-by: Vincent HERILIER vincent.herilier@hp.com