Before this rev., the searchpanel was automatically disabled (not
present) in actions obtained by following links or buttons (e.g.
stat buttons).
This rev. removes this constraint, but adds the possibiliy to
disable it by setting key 'search_panel' to false in the context.
Note that in this case, the active categories are never retrieved
from the local storage (i.e. the last one set). If no default is
given, 'All' is simply selected (no domain).
Task 2069310