Re-added listview "destroy" event

Partial revert of I593197cec7f23f4cc017bc9a4a0ca685aa55dc9d.
Despite the statement in I593197cec7f23f4cc017bc9a4a0ca685aa55dc9d,
the "destroy" event is in use by toolbar definitions, i.e.
jquery.wikibase.statementview.js, line 446; jquery.wikibase.claimlistview.js, line 480; etc.

Change-Id: I1487920026d273726dc6450abb74f5b889ec1ec2
Merge "Re-added listview "destroy" event"