Removed unused helper.
Replaces find(:first/:all) calls.
Replaces find(:first) calls.
Replaces find(:first) calls in migrations.
Replaces find(:all) calls in acts_as_searchable.
Preserve the "from" parameter in activity links.
Replaces find(:all) calls.
Replaces find(:all) calls in classic_pagination.
Restores acts_as_tree instance methods removed in r10919.
