PLF-5308 "Who Is Online" portlet takes a lot of time when user signs in

Fix description:
* User information (activity, post, etc) is loaded when the mouse hovers on the corresponding avatar.
PLF-4648: Add key for WAI Portal template
en injection on 20130801-125346
fr injection on 20130801-125346
ar injection on 20130802-110919
ja injection on 20130802-110919
de injection on 20130802-110919
vi injection on 20130802-110919
sv-SE injection on 20130802-110919
it injection on 20130802-110919
pt-BR injection on 20130802-110919
es-ES injection on 20130802-110919
Merge commit 'e51e063e3f5647a78c910f49e24d4abb7f5e764e' into HEAD