[FIX] web kanban: Remember all Ids dataset. For bug : click on Show More...(At Bottom of Kanban view). After, when you click on a record, it give : could not find id#x error.

bzr revid: chm@openerp.com-20121127083935-6tmbvee0ghuta00f
Conflicts:
	addons/web_kanban/static/src/js/kanban.js
Merge branch 'fix/kanban' into 7.0