WebStyle: menu rendering improvement

* Introduces new top level menu `personalize` for user related items.

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
WebStyle: fix legacy publisher form dictionary

* Fixes issue with parsing url arguments to dictionary:
  ?a=1&b=2&b=3 -> {'a':1, b: [2,3]}.  (closes #1474)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>