cubicweb-bootstrap #4935417 port cubicweb 3.20 changes to the user menu [validation pending]

see cubicweb ticket #3803684, http://hg.logilab.org/master/cubicweb/rev/3d7e500a0202

prioritynormal
typebug
done in1.0.1
load1.000
load left0.000
closed by#73b3277bd2da [views] Add icons on CookieLoginComponent / AuthenticatedUserStatus (closes #4935417)
patch[views] Add icons on CookieLoginComponent / AuthenticatedUserStatus (closes #4935417) [applied]