[FIX] base_action_rule: typo when committing base action rule
update, evaluate the action filter_domain, not its non-existing context.
[REV] website: new blog demo snippets

This reverts commit 7246b8105bdebdd175ca82d5018f68e15e60eb43.
[IMP] event: remove automatic date_end assignation based on
date_begin; also quickly fixed view of event locations.